feat(playable): 首个 Mac 联网内测版 STB-01 soak 工具与发布状态文档

- 新增 script/playable_soak.sh：先做 soak 配置/资源校验，无 --allow-gameplay
  只校验不启动客户端；N(>=10) 次独立正常退出运行 + 墙钟 soak，失败即停止后续
  运行并记 BLOCKED；写本批次 release-manifest.json 后聚合
- run_client_gate.sh：确认的故障代理对所有 suite 启动（共享场景的退出运行也经代理）；
  soak 超时下限只约束 soak 客户端（validate_soak 增加 soak_client 参数）
- 新增本地 127.0.0.1 故障代理、RSS 采样/内存判定、窗口/指标/流程模块及其测试
- forest_mob_render_test 输出 PASS/FAIL 标记，供 rendering_batch_test.sh 识别
- 新增 docs/FIRST-MAC-PLAYABLE-STATUS.md：如实记录 PASS/BLOCKED、已知问题与环境需求
- .gitignore 排除本地场景配置、凭据文件与运行输出

离线回归：rendering_batch_test.sh failures=0，playable_gate_test.sh PASS，
node 夹具测试 PASS。未联网运行，未重建候选包。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ft3kXpNdLbKEfg5uDLfqVF

project/fx/effect_registry.gd

@@ -6,12 +6,21 @@
 #   var pv := fxr.spawn_at("hit_spark", world, global_pos)
 extends RefCounted
 
+## Lifecycle boundaries of every effect this registry creates. lifetime_ms is the
+## MSE-defined length (-1 = looping, lives as long as its owner). fx_finished is
+## emitted when the node actually leaves the tree; reason "cleanup" means its own
+## playback clock freed it, "removed" means the owner/scene removed it earlier.
+signal fx_spawned(effect: String, fx_id: int, lifetime_ms: int)
+signal fx_finished(effect: String, fx_id: int, lifetime_ms: int, elapsed_ms: int, reason: String)
+
 const Mse = preload("res://fx/mse.gd")
 const EffectPlayer = preload("res://fx/effect_player.gd")
 
 var assets_root := ""
 var _path_cache := {}    # name -> abs .mse path ("" = not found)
 var _spec_cache := {}    # abs path -> parsed spec
+# Process-wide so ids stay unique when GameScene rebuilds its registry.
+static var _next_fx_id := 0
 
 func setup(assets: String) -> void:
 	assets_root = assets
@@ -89,8 +98,23 @@ func spawn(name: String, parent: Node3D, one_shot := true) -> Node3D:
 	fx.build(s, assets_root)
 	parent.add_child(fx)
 	fx.play(one_shot)
+	_track(fx, name)
 	return fx
 
+func _track(fx: Node3D, name: String) -> void:
+	_next_fx_id += 1
+	var fx_id := _next_fx_id
+	var lifetime_ms: int = fx.defined_lifetime_ms
+	fx.tree_exiting.connect(_on_fx_exiting.bind(fx, name, fx_id, lifetime_ms, Time.get_ticks_msec()),
+		CONNECT_ONE_SHOT)
+	fx_spawned.emit(name, fx_id, lifetime_ms)
+
+func _on_fx_exiting(fx: Node3D, name: String, fx_id: int, lifetime_ms: int, spawned_ms: int) -> void:
+	var reason := "removed"
+	if is_instance_valid(fx) and not String(fx.finish_reason).is_empty():
+		reason = fx.finish_reason
+	fx_finished.emit(name, fx_id, lifetime_ms, Time.get_ticks_msec() - spawned_ms, reason)
+
 # 在世界某点播一次性
 func spawn_at(name: String, world_parent: Node3D, global_pos: Vector3, one_shot := true) -> Node3D:
 	var fx := spawn(name, world_parent, one_shot)