feat: 문서 상세 조회 및 HWP/HWPX 업로드 지원

src/main/java/com/fowoco/server/document/api/DocumentController.java

@@ -2,6 +2,7 @@
 
 import com.fowoco.server.auth.application.ActorContext;
 import com.fowoco.server.auth.application.port.ActorContextProvider;
+import com.fowoco.server.document.application.DocumentDetailResult;
 import com.fowoco.server.document.application.DocumentPageResult;
 import com.fowoco.server.document.application.DocumentService;
 import com.fowoco.server.worker.application.WorkerDocumentSearchQuery;
@@ -23,6 +24,7 @@
 import org.springframework.http.MediaType;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
@@ -96,4 +98,30 @@ public DocumentPageResponse list(
                 .toList();
         return new DocumentPageResponse(items, result.page(), result.size(), result.totalElements());
     }
+
+    @Operation(
+            operationId = "getDocument",
+            summary = "서류 단건 상세 조회",
+            description = "연결된 파일 정보와 expected_version 기준값을 함께 반환합니다."
+    )
+    @ApiResponses({
+            @ApiResponse(
+                    responseCode = "200",
+                    description = "조회 성공",
+                    content = @Content(
+                            mediaType = MediaType.APPLICATION_JSON_VALUE,
+                            schema = @Schema(implementation = DocumentDetailResponse.class)
+                    )
+            ),
+            @ApiResponse(responseCode = "401", ref = "#/components/responses/Unauthorized"),
+            @ApiResponse(responseCode = "403", ref = "#/components/responses/Forbidden"),
+            @ApiResponse(responseCode = "404", ref = "#/components/responses/NotFound")
+    })
+    @GetMapping(path = "/{documentId}", produces = MediaType.APPLICATION_JSON_VALUE)
+    @PreAuthorize("hasAnyRole('ADMIN', 'HR', 'VIEWER')")
+    public DocumentDetailResponse findById(@Parameter(description = "서류 ID") @PathVariable UUID documentId) {
+        ActorContext actor = actorContextProvider.requireCurrentActor();
+        DocumentDetailResult result = documentService.findById(documentId, actor);
+        return DocumentDetailResponse.from(result);
+    }
 }

src/main/java/com/fowoco/server/document/api/DocumentDetailResponse.java

@@ -0,0 +1,168 @@
+package com.fowoco.server.document.api;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fowoco.server.document.application.DocumentDetailResult;
+import com.fowoco.server.file.domain.ScanStatus;
+import com.fowoco.server.worker.domain.DocumentType;
+import com.fowoco.server.worker.domain.SubmissionStatus;
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.time.LocalDate;
+import java.util.UUID;
+
+@Schema(name = "DocumentDetailResponse", description = "서류 단건 상세 응답 (연결된 파일 정보 포함)")
+public final class DocumentDetailResponse {
+
+    @JsonProperty("worker_document_id")
+    @Schema(name = "worker_document_id", format = "uuid", requiredMode = Schema.RequiredMode.REQUIRED)
+    private final UUID workerDocumentId;
+
+    @JsonProperty("worker_id")
+    @Schema(name = "worker_id", format = "uuid", requiredMode = Schema.RequiredMode.REQUIRED)
+    private final UUID workerId;
+
+    @JsonProperty("task_id")
+    @Schema(name = "task_id", format = "uuid", description = "연결된 업무카드 ID")
+    private final UUID taskId;
+
+    @JsonProperty("display_name")
+    @Schema(name = "display_name", description = "근로자 화면 표시 이름")
+    private final String displayName;
+
+    @JsonProperty("document_type")
+    @Schema(name = "document_type", requiredMode = Schema.RequiredMode.REQUIRED)
+    private final DocumentType documentType;
+
+    @JsonProperty("submission_status")
+    @Schema(name = "submission_status", requiredMode = Schema.RequiredMode.REQUIRED)
+    private final SubmissionStatus submissionStatus;
+
+    @JsonProperty("expiry_date")
+    @Schema(name = "expiry_date", format = "date")
+    private final LocalDate expiryDate;
+
+    @JsonProperty("version")
+    @Schema(name = "version", description = "PATCH 요청의 expected_version 기준값", requiredMode = Schema.RequiredMode.REQUIRED)
+    private final long version;
+
+    @JsonProperty("file_id")
+    @Schema(name = "file_id", format = "uuid")
+    private final UUID fileId;
+
+    @JsonProperty("file_name")
+    @Schema(name = "file_name", description = "연결된 파일의 표시 파일명 (파일 없으면 null)")
+    private final String fileName;
+
+    @JsonProperty("file_mime_type")
+    @Schema(name = "file_mime_type", description = "연결된 파일의 MIME 타입 (파일 없으면 null)")
+    private final String fileMimeType;
+
+    @JsonProperty("file_size")
+    @Schema(name = "file_size", description = "연결된 파일의 크기(byte) (파일 없으면 null)")
+    private final Long fileSize;
+
+    @JsonProperty("file_scan_status")
+    @Schema(name = "file_scan_status", description = "연결된 파일의 검사 상태 (파일 없으면 null)")
+    private final ScanStatus fileScanStatus;
+
+    private DocumentDetailResponse(
+            UUID workerDocumentId,
+            UUID workerId,
+            UUID taskId,
+            String displayName,
+            DocumentType documentType,
+            SubmissionStatus submissionStatus,
+            LocalDate expiryDate,
+            long version,
+            UUID fileId,
+            String fileName,
+            String fileMimeType,
+            Long fileSize,
+            ScanStatus fileScanStatus
+    ) {
+        this.workerDocumentId = workerDocumentId;
+        this.workerId = workerId;
+        this.taskId = taskId;
+        this.displayName = displayName;
+        this.documentType = documentType;
+        this.submissionStatus = submissionStatus;
+        this.expiryDate = expiryDate;
+        this.version = version;
+        this.fileId = fileId;
+        this.fileName = fileName;
+        this.fileMimeType = fileMimeType;
+        this.fileSize = fileSize;
+        this.fileScanStatus = fileScanStatus;
+    }
+
+    public static DocumentDetailResponse from(DocumentDetailResult result) {
+        var document = result.document();
+        var storedFile = result.storedFile();
+        return new DocumentDetailResponse(
+                document.workerDocumentId(),
+                document.workerId(),
+                document.taskId(),
+                result.workerDisplayName(),
+                document.documentType(),
+                document.submissionStatus(),
+                document.expiryDate(),
+                document.version(),
+                document.fileId(),
+                storedFile == null ? null : storedFile.name(),
+                storedFile == null ? null : storedFile.mimeType(),
+                storedFile == null ? null : storedFile.size(),
+                storedFile == null ? null : storedFile.scanStatus()
+        );
+    }
+
+    public UUID getWorkerDocumentId() {
+        return workerDocumentId;
+    }
+
+    public UUID getWorkerId() {
+        return workerId;
+    }
+
+    public UUID getTaskId() {
+        return taskId;
+    }
+
+    public String getWorkerDisplayName() {
+        return displayName;
+    }
+
+    public DocumentType getDocumentType() {
+        return documentType;
+    }
+
+    public SubmissionStatus getSubmissionStatus() {
+        return submissionStatus;
+    }
+
+    public LocalDate getExpiryDate() {
+        return expiryDate;
+    }
+
+    public long getVersion() {
+        return version;
+    }
+
+    public UUID getFileId() {
+        return fileId;
+    }
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public String getFileMimeType() {
+        return fileMimeType;
+    }
+
+    public Long getFileSize() {
+        return fileSize;
+    }
+
+    public ScanStatus getFileScanStatus() {
+        return fileScanStatus;
+    }
+}

src/main/java/com/fowoco/server/document/api/DocumentItemResponse.java

@@ -19,6 +19,10 @@ public final class DocumentItemResponse {
     @Schema(name = "worker_id", format = "uuid", requiredMode = Schema.RequiredMode.REQUIRED)
     private final UUID workerId;
 
+    @JsonProperty("task_id")
+    @Schema(name = "task_id", format = "uuid", description = "연결된 업무카드 ID")
+    private final UUID taskId;
+
     @JsonProperty("display_name")
     @Schema(
             name = "display_name",
@@ -43,33 +47,43 @@ public final class DocumentItemResponse {
     @Schema(name = "file_id", format = "uuid")
     private final UUID fileId;
 
+    @JsonProperty("version")
+    @Schema(name = "version", description = "PATCH 요청의 expected_version 기준값", requiredMode = Schema.RequiredMode.REQUIRED)
+    private final long version;
+
     private DocumentItemResponse(
             UUID workerDocumentId,
             UUID workerId,
+            UUID taskId,
             String displayName,
             DocumentType documentType,
             SubmissionStatus submissionStatus,
             LocalDate expiryDate,
-            UUID fileId
+            UUID fileId,
+            long version
     ) {
         this.workerDocumentId = workerDocumentId;
         this.workerId = workerId;
+        this.taskId = taskId;
         this.displayName = displayName;
         this.documentType = documentType;
         this.submissionStatus = submissionStatus;
         this.expiryDate = expiryDate;
         this.fileId = fileId;
+        this.version = version;
     }
 
     public static DocumentItemResponse from(WorkerDocument document, String displayName) {
         return new DocumentItemResponse(
                 document.workerDocumentId(),
                 document.workerId(),
+                document.taskId(),
                 displayName,
                 document.documentType(),
                 document.submissionStatus(),
                 document.expiryDate(),
-                document.fileId()
+                document.fileId(),
+                document.version()
         );
     }
 
@@ -81,6 +95,10 @@ public UUID getWorkerId() {
         return workerId;
     }
 
+    public UUID getTaskId() {
+        return taskId;
+    }
+
     public String getWorkerDisplayName() {
         return displayName;
     }
@@ -100,4 +118,8 @@ public LocalDate getExpiryDate() {
     public UUID getFileId() {
         return fileId;
     }
+
+    public long getVersion() {
+        return version;
+    }
 }

src/main/java/com/fowoco/server/document/application/DocumentDetailResult.java

@@ -0,0 +1,7 @@
+package com.fowoco.server.document.application;
+
+import com.fowoco.server.file.domain.StoredFile;
+import com.fowoco.server.worker.domain.WorkerDocument;
+
+public record DocumentDetailResult(WorkerDocument document, String workerDisplayName, StoredFile storedFile) {
+}

src/main/java/com/fowoco/server/document/application/DocumentService.java

@@ -1,7 +1,11 @@
 package com.fowoco.server.document.application;
 
 import com.fowoco.server.auth.application.ActorContext;
+import com.fowoco.server.common.error.ApiException;
 import com.fowoco.server.common.security.TenantDatabaseContext;
+import com.fowoco.server.document.application.error.DocumentErrorCode;
+import com.fowoco.server.file.application.port.StoredFileRepository;
+import com.fowoco.server.file.domain.StoredFile;
 import com.fowoco.server.worker.application.WorkerDocumentSearchQuery;
 import com.fowoco.server.worker.application.port.WorkerDocumentRepository;
 import com.fowoco.server.worker.application.port.WorkerRepository;
@@ -21,18 +25,38 @@ public class DocumentService {
 
     private final WorkerDocumentRepository workerDocumentRepository;
     private final WorkerRepository workerRepository;
+    private final StoredFileRepository storedFileRepository;
     private final TenantDatabaseContext tenantDatabaseContext;
 
     public DocumentService(
             WorkerDocumentRepository workerDocumentRepository,
             WorkerRepository workerRepository,
+            StoredFileRepository storedFileRepository,
             TenantDatabaseContext tenantDatabaseContext
     ) {
         this.workerDocumentRepository = workerDocumentRepository;
         this.workerRepository = workerRepository;
+        this.storedFileRepository = storedFileRepository;
         this.tenantDatabaseContext = tenantDatabaseContext;
     }
 
+    @Transactional(readOnly = true)
+    public DocumentDetailResult findById(UUID workerDocumentId, ActorContext actor) {
+        tenantDatabaseContext.setCompanyIdForCurrentTransaction(actor.companyId());
+        UUID companyId = actor.companyId();
+        WorkerDocument document = workerDocumentRepository
+                .findByIdAndCompanyId(workerDocumentId, companyId)
+                .orElseThrow(() -> new ApiException(DocumentErrorCode.DOCUMENT_NOT_FOUND));
+        String displayName = workerRepository
+                .findByWorkerIdAndCompanyId(document.workerId(), companyId)
+                .map(Worker::displayName)
+                .orElse(null);
+        StoredFile storedFile = document.fileId() == null
+                ? null
+                : storedFileRepository.findByIdAndCompanyId(document.fileId(), companyId).orElse(null);
+        return new DocumentDetailResult(document, displayName, storedFile);
+    }
+
     @Transactional(readOnly = true)
     public DocumentPageResult findPage(ActorContext actor, WorkerDocumentSearchQuery query) {
         tenantDatabaseContext.setCompanyIdForCurrentTransaction(actor.companyId());

src/main/java/com/fowoco/server/document/application/error/DocumentErrorCode.java

@@ -7,6 +7,10 @@ public enum DocumentErrorCode implements ApiErrorCode {
     DOCUMENT_REQUEST_DRAFT_VERSION_CONFLICT(
             HttpStatus.CONFLICT,
             "다른 사용자가 먼저 수정했습니다. 새로고침 후 다시 시도해 주세요."
+    ),
+    DOCUMENT_NOT_FOUND(
+            HttpStatus.NOT_FOUND,
+            "문서를 찾을 수 없습니다."
     );
 
     private final HttpStatus status;

src/main/java/com/fowoco/server/file/application/FileService.java

@@ -41,7 +41,8 @@ public class FileService {
             "image/jpeg",
             "image/png",
             "image/webp",
-            "application/pdf"
+            "application/pdf",
+            "application/hwp+zip"
     );
 
     private final StoredFileRepository storedFileRepository;

src/main/java/com/fowoco/server/worker/application/port/WorkerDocumentRepository.java

@@ -16,6 +16,8 @@ Optional<WorkerDocument> findByIdAndWorkerIdAndCompanyId(
             UUID companyId
     );
 
+    Optional<WorkerDocument> findByIdAndCompanyId(UUID workerDocumentId, UUID companyId);
+
     WorkerDocument update(WorkerDocument document);
 
     List<WorkerDocument> findPage(UUID companyId, WorkerDocumentSearchQuery query);