docs(M03): accept M2 mesh load pipeline state

Work-Package: M03-RND-M2-MESH-LOAD-PIPELINE-001
Agent: sindo-main-codex
Tests: post-merge pipeline, classifier, materials, shutdown, facade, internal-access, manifest, documentation and coordination gates pass
Fidelity: preserves request polling/completion order, statuses, metrics and shutdown drain; 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`;
+- 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`;
   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`,
@@ -44,7 +44,8 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   `M03-RND-WMO-SCENE-RESOURCE-CACHE-001`,
   `M03-RND-ADT-WATER-LOAD-PIPELINE-001`,
   `M03-RND-ADT-WATER-SCENE-FINALIZER-001`,
-  `M03-RND-M2-RUNTIME-REBUILD-CLASSIFIER-001`
+  `M03-RND-M2-RUNTIME-REBUILD-CLASSIFIER-001`,
+  `M03-RND-M2-MESH-LOAD-PIPELINE-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
@@ -135,6 +136,13 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   regressions and checkpoint dry-run `7/7` passed. Post-merge classifier
   (`45.439ms`), materials, shutdown, M2 batch planner, facade, internal-access
   `35`, `7/7` manifest, documentation and coordination gates remained green.
+  M2 mesh load pipeline state passed `cases=11 iterations=100
+  elapsed_ms=100.273` with request validation/dedupe, insertion-order polling,
+  terminal transition/completion FIFO, opaque statuses, discard, detached
+  diagnostics, metrics, clear and 100-by-256 timing. Thirty-four adjacent
+  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.
   M02 terrain-query regression
   remained green (13 pre-existing expired M00 claim warnings).
 - Fidelity comparison: all 16 historical operation limits and drain sites were
@@ -200,6 +208,11 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   `0.000001` speed threshold, four-stage cap and first-decision-per-path cache
   lifetime. Raw loading, material refresh version, M2Builder rebuild/fallback and
   Mesh adoption remain loader-owned.
+  Static M2 mesh pending requests preserve normalized-path dedupe and Dictionary
+  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.
   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;
@@ -225,6 +238,7 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   drain/release/reset/shutdown/metrics adapters,
   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,
   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
@@ -238,9 +252,9 @@ Runtime и Editor используют facade; planner/scheduler тестиру
   private Azeroth data was absent for the asset-backed ADT placement probe; M2
   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 is separated,
-  but raw loading, resource/queue transitions and mesh finalization remain in
-  the loader; raw
+  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
   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;