Audit pipeline PR #9: determinism + fact extraction + verifier gate + KB stats + context injection (PR #9)

Bundles PR #9's work for the audit pipeline:

- N=3 consensus on cloud inference (gpt-oss:120b parallel) with qwen3-coder:480b tie-breaker
- audit_discrepancies.jsonl logs N-run disagreements
- scrum_master reviews route through llm_team fact extraction; source="scrum_review"
- Verifier-gated persistence: drops INCORRECT, keeps UNVERIFIABLE/UNCHECKED; schema_version:2
- scrum_master_reviewed flag on accepted reviews
- auditor/kb_stats.ts: on-demand observability script
- claim_parser history/proof pattern class (verified-on-PR, was-flipping, the-proven-X)
- claim_parser quoted-string guard (mirrors static.ts fix)
- fact_extractor project context injection via docs/AUDITOR_CONTEXT.md
- Fixed verifier-verdict parser to handle multiple gemma2 output formats

Empirical: 3-run determinism test on unchanged PR #9 SHA showed 7/7 warn findings stable; block count oscillation eliminated; llm_team quality scores 8-9 on context-injected extract runs.

See PR #9 for full run-by-run commit history.

auditor/audit.ts

@@ -56,7 +56,7 @@ export async function auditPr(pr: PrSnapshot, opts: AuditOptions = {}): Promise<
   const [staticFindings, dynamicFindings, inferenceFindings, kbFindings] = await Promise.all([
     runStaticCheck(diff),
     opts.skip_dynamic ? Promise.resolve(stubFinding("dynamic", "skipped by options")) : runDynamicCheck(),
-    opts.skip_inference ? Promise.resolve(stubFinding("inference", "skipped by options")) : runInferenceCheck(claims, diff),
+    opts.skip_inference ? Promise.resolve(stubFinding("inference", "skipped by options")) : runInferenceCheck(claims, diff, { pr_number: pr.number, head_sha: pr.head_sha }),
     runKbCheck(claims, pr.files.map(f => f.path)),
   ]);