Close heading injection and exempt code-fetched rendered strings

[samrusani]

Summary

• Collapse pre-table model fields and pin the claims-table start to a template opener so a rationale cannot steal the region (AUD-001).
• Exempt code-fetched strings the memo already prints (office, network names, media domains, claim source labels). CI re-verifies each class against sibling evidence (AUD-002).
• Invert the office-address CLI test: a registry address containing a banned word now screens honestly. Search terms in QUERY_CATEGORIES stay gated.

Test plan

• 812 tests passed locally (was 786)
• ruff check, ruff format --check, mypy, python scripts/check_language.py
• CI 3.11 / 3.12 / 3.13, package, and audit
• Confirm fixtures and snapshot memos are unchanged
• Confirm 1 Scam Passage screens and model prose scam still fails

[greptile-apps]

Greptile Summary

The PR hardens claims-table boundary detection against heading injection and permits verified code-fetched strings to pass the language gate.

• Collapses pre-table synthesis fields and requires a template-controlled opener after the claims-table heading.
• Adds runtime and CI exemptions for verified office, network, media-domain, and claim-source strings.
• Expands regression coverage for heading injection, evidence verification, and legitimate registered-office text.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code failure established.

The new heading checks fail closed, all model-controlled fields rendered before the claims table are collapsed, and CI re-verifies the added fetched-string exemption classes against persisted evidence.

Important Files Changed

Filename	Overview
src/coldscreen/language.py	Adds whitespace collapse, widened code-fetched exemptions, and opener-pinned claims-table region detection without an accepted defect.
scripts/check_language.py	Re-verifies new exemption classes against sibling evidence before applying them to memo and casefile scans.
src/coldscreen/render.py	Collapses pre-table fields at render time, including stored casefiles used by rerender paths.
src/coldscreen/synthesis.py	Applies widened fetched-string exemptions and stores heading-sensitive fields in collapsed form.
src/coldscreen/pipeline.py	Passes the widened fetched-string set into the whole-memo language backstop.
tests/test_language.py	Adds extensive regression coverage for heading boundaries and evidence-backed exemption classes.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Casefile and fetched evidence] --> B[Render memo]
    B --> C[Collapse pre-table fields]
    C --> D[Locate claims-table heading]
    D --> E{Template opener follows?}
    E -- Yes --> F[Apply claim exemptions inside table region]
    E -- No --> G[Apply no claim exemptions]
    A --> H[Build code-fetched exemption set]
    H --> I[Apply exact span exemptions]
    F --> J[Language backstop]
    G --> J
    I --> J
    J --> K{Banned terms remain?}
    K -- Yes --> L[Reject memo]
    K -- No --> M[Allow memo]

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_{Reviews (1): Last reviewed commit: "Stop a rationale from stealing the claim..." | Re-trigger Greptile}