fix(physics): make collision activation starvation-free

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

@@ -802,6 +802,10 @@ public sealed class LandblockPhysicsPublisherTests
         Assert.DoesNotContain("_physicsDataCache.RemoveBuildingsForLandblock", publisherSource, StringComparison.Ordinal);
         Assert.DoesNotContain("_physicsEngine.ShadowObjects.Reflood", publisherSource, StringComparison.Ordinal);
         Assert.Contains("CommitCollisionGeneration(", publisherSource, StringComparison.Ordinal);
+        Assert.DoesNotContain(
+            "RestartCollisionRetainedOwnerCapture(",
+            publisherSource,
+            StringComparison.Ordinal);
     }
 
     private static void Publish(

tests/AcDream.Core.Tests/Physics/PhysicsEngineTests.cs

@@ -482,7 +482,15 @@ public class PhysicsEngineTests
     [Fact]
     public void ResolveWithTransition_SelfShadowEntry_NotPushedWhenIdMatches()
     {
-        var engine = MakeFlatEngine(terrainZ: 50f);
+        var freshCache = new PhysicsDataCache();
+        var engine = new PhysicsEngine { DataCache = freshCache };
+        engine.AddLandblock(
+            0xA9B4FFFFu,
+            new TerrainSurface(FlatHeightmap(50), LinearHeightTable()),
+            Array.Empty<CellSurface>(),
+            Array.Empty<PortalPlane>(),
+            worldOffsetX: 0f,
+            worldOffsetY: 0f);
         // FindObjCollisions early-returns when DataCache is null. An empty
         // cache is enough for cylinder objects; only BSP objects look up
         // entries inside.
@@ -490,9 +498,7 @@ public class PhysicsEngineTests
         // succeeds for the outdoor seed cell (0xA9B40039). In production the
         // streaming-center landblock is always resident before outdoor resolves run;
         // we replicate that invariant here by registering a flat dummy terrain.
-        var freshCache = new PhysicsDataCache();
         freshCache.CellGraph.RegisterTerrain(0xA9B4FFFFu, new TerrainSurface(FlatHeightmap(50), LinearHeightTable()), Vector3.Zero);
-        engine.DataCache = freshCache;
 
         const uint movingEntityId = 0xDEADBEEFu;
         var bodyPos   = new Vector3(96f, 96f, 50f);