refactor(runtime): own canonical entity and object lifetime

Introduce one presentation-free RuntimeEntityObjectLifetime for the exact entity directory and ClientObjectTable. Make GameWindow, graphical projections, retained UI, interaction, session routing, create/delete integration, and reset borrow that owner while preserving synchronous retail ordering, dormant retention, and retry semantics.

Co-authored-by: Codex <codex@openai.com>

tests/AcDream.App.Tests/Streaming/StreamingFrameControllerTests.cs

@@ -506,7 +506,9 @@ public sealed class StreamingFrameControllerTests
     }
 
     private static LiveEntityRuntime Runtime(GpuWorldState state) =>
-        new(state, new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
+        LiveEntityRuntimeFixture.Create(
+            state,
+            new DelegateLiveEntityResourceLifecycle(_ => { }, _ => { }));
 
     private static LoadedLandblock EmptyLandblock(uint landblock) =>
         new(landblock, new LandBlock(), Array.Empty<WorldEntity>());