Auditor self-test branch: real-world pipelines + cohesion Phase C + KB index (PR #8)

Bundles 12 commits validating the auditor + scrum_master architecture end-to-end:

- enrich_prd_pipeline / hard_task_escalation / scrum_master_pipeline stress tests
- Tree-split + scrum_reviews.jsonl + kb_query surfacing
- Verdict → audit_lessons feedback loop (closed)
- kb_index aggregator with confidence-based severity policy
- 9-run + 5-run empirical tests proved the predictive-compounding property
- Level 1 correction: temp=0 cloud inference for deterministic per-claim verdicts
- audit_one.ts dry-run CLI
- Fixes: static quoted-string guard, empirical-claim classification, symbol-resolver gate, repo-file size cap

See PR #8 for run-by-run commit history.

auditor/types.ts

@@ -18,7 +18,14 @@ export interface Claim {
   // Heuristic rating of how strong the claim is. "green+tested"
   // is strong; "should work" is weak. Drives sensitivity — stronger
   // claims get harder-blocked on weak evidence.
-  strength: "weak" | "moderate" | "strong";
+  //
+  // "empirical" is a separate class: runtime measurements like
+  // "N cloud calls" / "306s end-to-end" / "accepted on attempt N".
+  // These cannot be verified from a static diff — only from the test
+  // output that produced them. Inference skips diff-verification for
+  // empirical claims; they become info-level context unless a future
+  // runtime_evidence check contradicts them.
+  strength: "weak" | "moderate" | "strong" | "empirical";
 }
 
 export interface Finding {