refactor(srp): add renderer data invalidation seam

Introduce ScriptableRendererData dirty/invalidation support so renderer and feature caches can be released and rebuilt within the same managed asset runtime.

Add managed probes and scripting coverage for non-public dirty APIs and for renderer rebuild after invalidation, then archive the completed phase plan.

managed/GameScripts/ScriptableRenderContextApiSurfaceProbe.cs

@@ -35,6 +35,8 @@ namespace Gameplay
         public bool HasRendererBackedRenderPipelineType;
         public bool HasRendererDrivenRenderPipelineType;
         public bool HasRendererDataSetupRenderer;
+        public bool HasRendererDataSetDirty;
+        public bool HasRendererDataIsInvalidated;
         public bool HasRendererSupportsRendererRecording;
         public bool HasRendererRecordRenderer;
         public bool HasPublicRendererSupportsStageRenderGraph;
@@ -180,6 +182,17 @@ namespace Gameplay
                     "SetupRenderer",
                     BindingFlags.Instance |
                     BindingFlags.NonPublic) != null;
+            HasRendererDataSetDirty =
+                rendererDataType.GetMethod(
+                    "SetDirty",
+                    BindingFlags.Instance |
+                    BindingFlags.NonPublic) != null;
+            HasRendererDataIsInvalidated =
+                rendererDataType.GetProperty(
+                    "isInvalidated",
+                    BindingFlags.Instance |
+                    BindingFlags.NonPublic |
+                    BindingFlags.Public) != null;
             HasRendererSupportsRendererRecording =
                 rendererType.GetMethod(
                     "SupportsRendererRecording",