perf(diagnostics): expose prepared asset source counters

src/AcDream.App/Rendering/RenderFrameDiagnosticsController.cs

@@ -95,7 +95,12 @@ internal readonly record struct MeshStreamResourceDiagnostics(
     long FrameMipmapBytes,
     long GlobalCapacityBytes,
     long GlobalPhysicalCapacityBytes,
-    bool GlobalMigrationInProgress);
+    bool GlobalMigrationInProgress,
+    long PreparedProbes,
+    long PreparedReads,
+    long PreparedLoaded,
+    long PreparedMissing,
+    long PreparedCorrupt);
 
 internal readonly record struct TextureStreamResourceDiagnostics(
     int OwnedBindlessTextures,
@@ -254,6 +259,8 @@ internal sealed class RenderFrameDiagnosticsController :
             + $"mipmapFrame={mesh.FrameMipmapArrayCount}/{mesh.FrameMipmapBytes} "
             + $"meshCap={mesh.GlobalCapacityBytes} "
             + $"meshPhys={mesh.GlobalPhysicalCapacityBytes}/{mesh.GlobalMigrationInProgress} "
+            + $"prepared={mesh.PreparedProbes}/{mesh.PreparedReads}/"
+            + $"{mesh.PreparedLoaded}/{mesh.PreparedMissing}/{mesh.PreparedCorrupt} "
             + $"gpuTrack={process.TrackedGpuBytes}/{process.TrackedGpuBuffers}/"
             + $"{process.TrackedGpuTextures} "
             + $"managed={process.ManagedBytes}/{process.ManagedCommittedBytes} "