rnd(M03): introduce renderer facade seam

Work-Package: M03-RND-FACADE-001
Agent: sindo-main-codex
Tests: facade/focus/coordinate/manifest contracts, renderer dry-run, coordination and documentation gates
Fidelity: focus targets, budgets, queues, caches and visible renderer behavior remain unchanged

RENDER.md

@@ -25,7 +25,8 @@ Paired run 2026-07-11 подтвердил крупный coordinate/placement g
 
 ## Основные файлы
 
-- `src/scenes/streaming/streaming_world_loader.gd` - главный runtime streamer мира.
+- `src/render/world_render_facade.gd` - стабильная граница runtime/tools для focus и metrics.
+- `src/scenes/streaming/streaming_world_loader.gd` - внутренний runtime streamer мира.
 - `src/scenes/streaming/eastern_kingdoms_streaming.tscn` - текущая сцена для проверки Azeroth/Eastern Kingdoms.
 - `addons/mpq_extractor/loaders/adt_builder.gd` - сборка ADT terrain, control splat материалов и MH2O liquids.
 - `addons/mpq_extractor/loaders/m2_builder.gd` - сборка статического M2 mesh/material.
@@ -873,6 +874,21 @@ $exe = Join-Path $env:TEMP 'godot-4.6.1-openwc\Godot_v4.6.1-stable_win64.exe'
 - This closes a coordinate/renderer integration criterion only. It does not
   claim TrinityCore row equivalence or visual parity with the original client.
 
+## 2026-07-15 WorldRenderFacade First Seam
+
+- Runtime streaming scenes, checkpoint capture and renderer probes now submit
+  typed focus through `WorldRenderFacade`; those callers no longer call the
+  monolithic streamer's focus methods or configure its focus source directly.
+- Baseline capture reads queue/cache/activity counts through
+  `renderer_metrics_snapshot()`. The facade returns a deep copy, so diagnostics
+  cannot mutate renderer-owned state.
+- `StreamingWorldLoader` remains the internal implementation and still owns all
+  queues, tasks, caches, nodes and RIDs. The facade adds no parallel state or
+  replacement scheduler.
+- This package does not alter targets, budgets, cache versions, placement,
+  visibility, materials or animation. Environment, entity visuals and ground
+  query remain explicit follow-up facade contracts in M03.
+
 ## Practical Rule For Future Work
 
 If something improves quality but creates visible hitch, it is not done. Move it to bake/cache/background work, split finalization over frames, or prewarm it before the player can see it.