docs(M03): hand off WMO scene resource cache state

coordination/claims/M03-RND-WMO-SCENE-RESOURCE-CACHE-001.md

@@ -82,14 +82,30 @@ version validation.
 
 ## Status
 
-- State: claimed
-- Done: lifecycle and four negative-cache sources identified
-- Next: implement state holder, migrate loader adapters, verify and document
+- State: ready for integration
+- Done: state holder implemented; loader lookup/request/drain/reset/metrics
+  adapters migrated; shutdown regression and required documentation updated
+- Next: integrate and run post-merge smoke on master
 - Blocked by:
 
 ## Handoff
 
-- Commit:
-- Results:
-- Remaining risks:
-- Documentation updated:
+- Commit: `c839294`
+- Results: scene cache-state PASS (`cases=11`, `iterations=100`,
+  `elapsed_ms=40.768`; initial direct cold run `43.636ms`); render cache-state,
+  WMO queue/planner/registry/resolver/material/shutdown plus 18 adjacent
+  M2/terrain/facade/scheduler/streaming/coordinate regressions PASS;
+  documentation and coordination gates PASS; checkpoint dry-run PASS `7/7`.
+- Remaining risks: accepted PackedScenes remain strongly referenced until full
+  shutdown release; ResourceLoader/FileAccess I/O, cache-validation probes and
+  live fallback remain in loader; no proprietary stale/oversize fixture,
+  asset-backed traversal/leak run, p95/p99 or original-client paired evidence.
+  The extracted scene state passed cold; full loader cold execution still needs
+  editor class registration for pre-existing focus/coordinate global classes.
+- Documentation updated: inline public API; new
+  `docs/modules/wmo-scene-resource-cache-state.md`; render-cache spec, module
+  registry, world renderer and `RENDER.md`; data-flow/state/sequence diagrams,
+  ownership, threading, file-size/cache-version boundary, failure/recovery and
+  source map included.
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-WMO-SCENE-RESOURCE-CACHE-001:c839294 -->