K8: record blocked owner review and release evidence

docs/linuxcnc-web-wasm-manifest-ownership-remediation.md

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+# Manifest Ownership Remediation
+
+`coverage/manifest-ownership-remediation.report.json` is the K8-REL-08
+ownership assignment for all 6,249 `needs_owner` manifest seeds.  It assigns a
+deterministic WS-0..WS-7 workstream role from the source prefix and records an
+independent review owner, assignment rule, source hash and blocked status for
+each row.
+
+The report is intentionally additive.  `coverage/manifest.jsonl` is manifest
+v1 and has no owner field; changing it in place would invalidate the locked
+manifest hash.  Therefore the assignment status is
+`proposed_blocked_review`, not `accepted`.  Encoding a reviewed assignment in
+the manifest requires feature owner confirmation, feature/test/oracle
+evidence, and a new context id when the manifest hash changes.
+
+The report covers every unassigned seed exactly once, but does not claim that
+any seed is implemented, verified or accepted.  The release decision remains
+`blocked_not_release_candidate` with `release_action: STOP_RELEASE`.
+
+Regenerate and test it with:
+
+```bash
+python3 scripts/generate_manifest_ownership_remediation.py
+python3 scripts/test_manifest_ownership_remediation.py
+```