Build: stop packing an empty symbol package

.github/workflows/main.yml

@@ -73,7 +73,11 @@ jobs:
       - name: Create NuGet package
         run: dotnet pack --configuration Release --no-build --output ${{ env.NuGetDirectory }}
 
-      # Publish the NuGet package as an artifact, so they can be used in the following jobs
+      # Publish the NuGet package as an artifact, so they can be used in the following jobs.
+      # Only .nupkg: symbols are embedded in the assembly (see Directory.Build.props), so no symbol
+      # package is produced. Were one ever added, it would have to be listed here too - `dotnet
+      # nuget push` only forwards a .snupkg that sits NEXT TO the .nupkg, and `*.nupkg` does not
+      # match `.snupkg`.
       - uses: actions/upload-artifact@v7
         with:
           name: nuget

Directory.Build.props

@@ -41,11 +41,19 @@
   </PropertyGroup>
 
   <!-- Source Link -->
+  <!--
+    No IncludeSymbols/SymbolPackageFormat here on purpose. DotNet.ReproducibleBuilds sets
+    DebugType=embedded, so the portable PDB lives inside the assembly and no separate .pdb is ever
+    produced; asking for a snupkg then packs an empty one - FastComponents.1.0.0.snupkg shipped as
+    a 3.5 KB shell holding nothing but a nuspec. nuget.org rejects such a package outright ("The
+    package does not contain any symbol (.pdb) files"), which the release never hit only because
+    the artifact step uploads *.nupkg and that pattern does not match .snupkg, so the empty symbol
+    package never reached the deploy job. Embedded is the better trade anyway: consumers get
+    symbols and Source Link with no symbol-server configuration at all.
+  -->
   <PropertyGroup>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
-    <IncludeSymbols>true</IncludeSymbols>
-    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
   </PropertyGroup>
 
   <!-- Deterministic builds -->