docs(pair-corpus-honesty): close the spec; escalations resolved, roadmap carries the measured state

- tasks.md: all tasks checked; the two escalations are closed (5.1 by the
  Req 10 pointer rows, 5.3 by the Req 9 review tiers); round 11 recorded
  with the carry-forwards for corpus-seeded-mechanisms and
  overlay-ir-completeness.
- roadmap: measured state after tiers and pointer slices (vibe-py 115,
  agent-vfc 59, gates byte-identical to pre-spec); pair-corpus-honesty
  marked completed.
- spec.json: completed 2026-09-05 after eleven review rounds.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG

.kiro/specs/pair-corpus-honesty/spec.json

@@ -1,7 +1,7 @@
 {
   "feature_name": "pair-corpus-honesty",
   "created_at": "2026-09-04T16:12:17Z",
-  "updated_at": "2026-09-05T09:00:00Z",
+  "updated_at": "2026-09-05T12:00:00Z",
   "language": "en",
   "phase": "implementation",
   "supersedes": [
@@ -24,5 +24,8 @@
   "ready_for_implementation": true,
   "amendments": [
     "2026-09-05 review tiers (Req 9) and pointer slices (Req 10), approved by the maintainer in session"
-  ]
+  ],
+  "completed": true,
+  "completed_at": "2026-09-05T12:00:00Z",
+  "review_rounds": 11
 }