Require explicit manifest schemas

docs/operations.md

@@ -480,6 +480,13 @@ Durable session paths:
 - `config/**`
 - `runs/**`
 
+`manifest.json` is a versioned local-state document. Narratio accepts only
+`narratio.session-manifest.v1`; each invocation record under `runs/**` accepts
+only `narratio.run-manifest.v1`. Do not edit an older manifest to add missing
+markers. Move unsupported state aside and regenerate it, restore a verified
+current committed snapshot, or republish healthy regenerated state as the
+relevant workflow requires.
+
 Validated Notarius bundles live below `artifacts/notarius/{run_id}/`; receipt,
 stderr, and pre-promotion output remain in the producing run's `extract`
 directory as described in [Extraction Workflow](#extraction-workflow).