docs(M03): hand off ADT water scene finalizer

coordination/claims/M03-RND-ADT-WATER-SCENE-FINALIZER-001.md

@@ -81,14 +81,30 @@ the existing `ADTBuilder` geometry/material implementation.
 
 ## Status
 
-- State: claimed
-- Done: both loader-owned water materialization call sites and policy boundaries identified
-- Next: implement finalizer, migrate adapters, verify and document
+- State: ready for integration
+- Done: stateless finalizer implemented; both loader water paths migrated;
+  synthetic scene/owner regression and required documentation added
+- Next: integrate and run post-merge smoke on master
 - Blocked by:
 
 ## Handoff
 
-- Commit:
-- Results:
-- Remaining risks:
-- Documentation updated:
+- Commit: `235be3a`
+- Results: scene finalizer PASS (`cases=8`, `iterations=100`,
+  `elapsed_ms=0.042`; initial `0.024ms`); synthetic liquid produced one
+  four-vertex/six-index surface with tile attachment and recursive owner; water
+  pipeline (`119.648ms`), WMO/M2/terrain/facade/scheduler/streaming/coordinate,
+  materials, shutdown, internal-access `36` and 32 headless contract regressions
+  PASS; documentation and coordination gates PASS; checkpoint dry-run PASS `7/7`.
+- Remaining risks: main-thread mesh/material construction remains synchronous
+  behind one existing permit; the Dictionary builder boundary remains untyped;
+  proprietary MH2O/MCLQ traversal/leak/p95/p99/original-client evidence is absent.
+  A verifier launched concurrently with the initial cold editor import observed
+  the pre-existing global-class cache race; serialized editor parse and shutdown
+  rerun passed, with only expected missing private asset diagnostics.
+- Documentation updated: inline public API; new
+  `docs/modules/adt-water-scene-finalizer.md`; water-pipeline spec, module registry,
+  world renderer and `RENDER.md`; data-flow/state/sequence/dependency diagrams,
+  ownership, main-thread effects, failure/recovery, migration and source map included.
+
+<!-- OPENWC_HANDOFF:READY:M03-RND-ADT-WATER-SCENE-FINALIZER-001:235be3a -->