docs: index verification receipt scope note

Author: LalaSkye

docs/governance/README.md

@@ -10,6 +10,7 @@ Each file has one job.
 | `INVARIANTS.md` | What must remain true. |
 | `BUILD_RECEIPTS.md` | What has changed and what claim boundary is held. |
 | `CHANGE_CONTROL.md` | When a change requires a receipt or claim-boundary review. |
+| `VERIFICATION_RECEIPT_SCOPE.md` | What local verification receipts are allowed to prove. |
 | `CI_TRIGGER_RECEIPT.md` | Why the first CI trigger commit exists and what it does not prove. |
 
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