docs(M03): accept M2 mesh resource cache state

Work-Package: M03-RND-M2-MESH-RESOURCE-CACHE-001
Agent: sindo-main-codex
Tests: post-merge cache, pipeline, classifier, materials, shutdown, facade, internal-access, manifest, documentation and coordination gates pass
Fidelity: preserves Mesh identity/replacement/final-shutdown lifetime; asset-backed visual parity remains unclaimed

targets/03-renderer-facade.md

@@ -27,7 +27,7 @@ Runtime и Editor используют facade; planner/scheduler тестиру
 ## Evidence
 
 - Date: 2026-07-17
-- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`, `606770c`, `630a0c1`, `f36fabb`, `24aef13`, `2342430`, `396be5e`, `f88bf97`, `3f84717`, `d2cb52f`, `f9e5a4f`, `c06aed5`, `a878e7c`, `60603e1`, `b4955d6`, `ada0fd9`, `f470775`, `874fd0f`, `38f831e`, `83b3618`;
+- Revision/worktree: master merges `7ece2ab`, `7e35de7`, `80cb084`, `d6e5b53`, `c69abd6`, `606770c`, `630a0c1`, `f36fabb`, `24aef13`, `2342430`, `396be5e`, `f88bf97`, `3f84717`, `d2cb52f`, `f9e5a4f`, `c06aed5`, `a878e7c`, `60603e1`, `b4955d6`, `ada0fd9`, `f470775`, `874fd0f`, `38f831e`, `83b3618`, `3094561`;
   packages `M03-RND-SCHEDULER-001`, `M03-RND-INTERNAL-ACCESS-GATE-001`,
   `M03-RND-FACADE-GROUND-QUERY-001`, `M03-RND-FACADE-ENVIRONMENT-001`,
   `M03-RND-FACADE-ENTITY-001`, `M03-RND-TERRAIN-CACHE-SERVICE-001`,
@@ -45,7 +45,8 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   `M03-RND-ADT-WATER-LOAD-PIPELINE-001`,
   `M03-RND-ADT-WATER-SCENE-FINALIZER-001`,
   `M03-RND-M2-RUNTIME-REBUILD-CLASSIFIER-001`,
-  `M03-RND-M2-MESH-LOAD-PIPELINE-001`
+  `M03-RND-M2-MESH-LOAD-PIPELINE-001`,
+  `M03-RND-M2-MESH-RESOURCE-CACHE-001`
 - Commands: dedicated scheduler/planner/facade/focus/coordinate/manifest/shutdown
   headless verifiers; Godot cold editor parse; coordination, documentation and diff gates.
 - Results: scheduler `cases=6 iterations=20000 elapsed_ms=10.216`; planner
@@ -143,6 +144,13 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   headless regressions and checkpoint dry-run `7/7` passed. Post-merge pipeline
   state (`69.196ms`), classifier, materials, shutdown, facade, internal-access
   `34`, `7/7` manifest, documentation and coordination gates remained green.
+  M2 mesh resource cache state passed `cases=9 iterations=100
+  elapsed_ms=38.974` with invalid-input guards, exact-reference lookup,
+  replacement, detached path diagnostics, idempotent clear and 100-by-256
+  timing. Thirty-five renderer/coordinate regressions and checkpoint dry-run
+  `7/7` passed. Post-merge cache state (`38.686ms`), pipeline, classifier,
+  materials, shutdown, facade, internal-access `34`, `7/7` manifest,
+  documentation and coordination gates remained green.
   M02 terrain-query regression
   remained green (13 pre-existing expired M00 claim warnings).
 - Fidelity comparison: all 16 historical operation limits and drain sites were
@@ -212,7 +220,11 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   insertion polling order; loaded/failed transitions preserve completion-order
   finalization FIFO and opaque statuses. All three pending-plus-finalize metrics,
   both clear sites and shutdown ResourceLoader drain order are unchanged; cache
-  path selection, I/O, permits, Mesh/missing caches and adoption remain loader-owned.
+  path selection, I/O, permits, shared missing state and adoption remain loader-owned.
+  Prepared static M2 Mesh lookups retain exact Resource identity, same-path
+  replacement and map-refresh lifetime; the only clear remains final shutdown
+  after asynchronous drain. Shared missing/prototype/animated caches, extraction,
+  refresh/rebuild and materialization remain loader-owned.
   No new build-12340 parity claim is made; asset-backed visual/p95/p99 comparison remains pending.
 - Changed files: scene-free scheduler and verifier; streamer budget composition/
   permit delegation; scheduler module spec; world renderer/module registry/RENDER notes;
@@ -239,6 +251,7 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   stateless ADT water scene finalizer and both loader build/attach adapters,
   memoized M2 runtime mesh rebuild classifier and loader query/clear adapters,
   M2 mesh load pipeline state and loader request/poll/finalize/metric/clear adapters,
+  prepared M2 Mesh resource cache state and loader lookup/store/shutdown adapters,
   expanded facade/internal-access/coordinate verifiers; work-package claims and this evidence.
 - Remaining risks: worker concurrency and stale-result validation remain
   streamer-owned; cancellation stops new permits but does not interrupt
@@ -253,8 +266,9 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   asset-backed visual transform recheck, grouping/build/tasks/caches/finalization
   and boundary traversal p95/p99 remain pending; path grouping is not yet
   culling-driven spatial-cell grouping; M2 rebuild classification and static
-  request/finalize bookkeeping are separated, but ResourceLoader I/O, Mesh/
-  missing caches and mesh finalization remain in the loader; raw
+  request/finalize bookkeeping and prepared Mesh cache ownership are separated,
+  but ResourceLoader I/O, shared missing state, Mesh extraction/preparation and
+  finalization remain in the loader; raw
   WMO ResourceLoader/FileAccess I/O, live fallback and group materialization
   remain in the loader;
   asset-backed WMO placement/portal/material/leak/p95/p99 evidence remains pending;