Preserve source changes made during watch reports

[tom-sapletta-com]

A source edit made while a watch report finishes can disappear: the watcher replaces its whole baseline after generating the report. This caused the required CLI-watch test for #118 to time out.

Retain the pre-report source snapshot and exclude the declared report and cache outputs from scans. Preserve polling, throttling, cancellation and ignore rules. Source files adjacent to generated paths remain watched, including when outputDir is the repository root.

Validation: four deterministic cases failed before the fix. All 15 watcher/CLI cases now pass, including successful/failed reports, cache feedback and adjacent source paths. Full verify after integrating current main: 450 passed, zero failed, one optional Java skip. Governance has zero errors/warnings; offline and Docker smoke pass. Hosted Java 17 and independent exact-head Validator approval remain required.

Ticket: ticket-100. Disjoint dependency work for completing PLF-13849. No changes to test timeouts or publication gates.

[ifuri-validator-agent]

Validator approval after policy checks for exact head 521a5de9f0d45fa21c8384693a6ea443d4606d42.

Ticket: ticket-100
Correlation ID: local-autogrammar-todo2code-pr-122-ticket-100
Model: openrouter/z-ai/glm-5.3-flash
Reviewed diff chunks: 1
Advisory LLM verdict: APPROVE
Advisory summary: Reviewed all 1 diff chunk(s). Watcher now retains the pre-report snapshot instead of rescanning after each report, and excludes pipeline-owned outputs (outputDir/runs, outputDir/latest.json, config.outputDir/cache) via an ignore matcher. The matcher correctly resolves to absolute paths and uses a path.sep-prefixed comparison, so siblings like runs-source.ts are not falsely ignored, including when outputDir is the repository root. Four deterministic regression tests cover successful/failed reports and both outputDir variants, and all required checks (verify, Java adapter JDK 17, koru / code-review) pass. Changes stay within intent.json's allowed paths.
Advisory findings: none
The LLM output above is advisory and was not used as the approval trust root.
Semantic review prerequisite: not_required; policy 676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7.

Actual PR impact radar

Exact range: edb202d12d8ad91d1faa36479586b3a93037d484...521a5de9f0d45fa21c8384693a6ea443d4606d42
Change digest: 9c2fd5441f474881511fe6a3e10711a8971f2f1123a9dae4ad115d382c437111
Score: 60/100 (L), estimated 74 min, split recommended: true
Affected services/components: repository-wide/unclassified

Machine-readable radar JSONL and SVG

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Merge will be attempted after this approval when explicitly authorized. ## Decision record (recomputable)

DECISION D-100-9766
TICKET ticket-100
HEAD_SHA 521a5de9f0d45fa21c8384693a6ea443d4606d42
CORRELATION_ID local-autogrammar-todo2code-pr-122-ticket-100
ACTOR agent:ifuri-validator-agent[bot]
APPLIED_RULE P-CORE-015
INPUT author_login = "tom-sapletta-com"
INPUT observed_checks = ["Live OpenRouter contract (opt-in)=SKIPPING","governance=SKIPPING","Java adapter (JDK 17 required)=PASS","verify=PASS","koru / code-review=PASS","governance / enforce=PASS","governance / remote lifecycle=PASS","verify=PASS","Java adapter (JDK 17 required)=PASS"]
INPUT required_checks = ["verify","Java adapter (JDK 17 required)","koru / code-review"]
INPUT required_checks_source = "protected registry + GitHub applied rules (env/request)"
INPUT reviewer_login = "ifuri-validator-agent[bot]"
INPUT semantic_review_assessment = {"schema":"subactor.validator/semantic-review-assessment/v1","subject":{"repository":"autogrammar/todo2code","pull_request":122,"head_sha":"521a5de9f0d45fa21c8384693a6ea443d4606d42","base_sha":"edb202d12d8ad91d1faa36479586b3a93037d484","diff_sha256":"bbde79ba9d9581cc92b4797bf1585e5f207461b21ecc8332c95e8802ae123374"},"policy":{"policy_schema":"subactor.validator/semantic-review-policy/v1","policy_version":1,"policy_sha256":"676cb4516bbfed2a000e40b9b1b6e4a430ecc761ec546aeb53d721a1905cfdd7","required":false,"critical_paths":[],"observed_paths":["project/ticket-100/README.md","project/ticket-100/intent.json","src/watch/watcher.ts","test/watch.test.ts"]},"grounding":"full-diff-not-per-finding-proof","execution_authority":false,"status":"not_required","reason":null,"review_sha256":null,"unresolved":[]}
INPUT superseded_checks = []
INPUT ticket_radar_receipt = {"schema":"subactor.ticket-radar/v1","base_sha":"edb202d12d8ad91d1faa36479586b3a93037d484","head_sha":"521a5de9f0d45fa21c8384693a6ea443d4606d42","change_digest":"9c2fd5441f474881511fe6a3e10711a8971f2f1123a9dae4ad115d382c437111","score":60,"complexity":"L","estimated_minutes":74,"split_recommended":true,"services":[],"authority":"ADVISORY","promotion":"FORBIDDEN"}
VERDICT APPROVE AUTHORITY DETERMINISTIC
REJECTED REQUEST_CHANGES BECAUSE NO_UNSAFE_CHANGE_REASON_FOUND
ADVISORY llm_verdict = "APPROVE" MODEL "openrouter/z-ai/glm-5.3-flash"
ASSERT VERDICT_AUTHORITY != "ADVISORY"