refactor(streaming): complete landblock presentation cutover

Remove the legacy GameWindow apply path and make the concrete render, physics, and static publishers the only production owner graph. Serialize full-window retirement with shared-origin teleport and session boundaries so old coordinate-frame resources cannot survive into a new world or login.

src/AcDream.Core/World/PhysicsDatBundle.cs

@@ -6,11 +6,10 @@ using DatEnvironment = DatReaderWriter.DBObjs.Environment;
 namespace AcDream.Core.World;
 
 /// <summary>
-/// The parsed dat objects <c>ApplyLoadedTerrainLocked</c> needs, pre-read by the
-/// streaming worker under <c>_datLock</c> so the apply makes ZERO DatCollection
-/// calls and the update thread never blocks on the worker's lock (the FPS
-/// 30↔200 swing was that lock-wait). Keyed by the same dat id the apply would
-/// have passed to <c>_dats.Get&lt;T&gt;</c>.
+/// Parsed DAT closure produced by <c>LandblockBuildFactory</c> under the shared
+/// reader gate and consumed by the render-thread presentation publishers.
+/// Publication makes zero DatCollection calls, so the update thread never
+/// blocks on worker DAT access. Entries retain their original DAT IDs.
 /// </summary>
 public sealed record PhysicsDatBundle(
     LandBlockInfo? Info,