feat(net): port retail physics spawn and event timestamps

Parse the complete PhysicsDesc plus F754/F755 packets, correct every PhysicsState bit, and gate all nine retail update channels with generation-safe immutable snapshots. Preserve ForcePosition, teleport, placement, velocity, parent, pickup, delete, and same-generation CreateObject ordering from the named client.

Separate accepted logical lifecycle notifications from retained UI qualities, make GUID replacement and session reset clear every projection exactly once, and add packet, wraparound, malformed-input, parent FIFO, canonical-position, reconnect, and GUID-reuse conformance coverage.

Co-Authored-By: Codex <noreply@openai.com>

docs/research/2026-05-24-door-bug-apparatus-shipped-findings.md

@@ -42,7 +42,7 @@ behavior, just with an apparatus artifact in place of clean walkthrough.
      **indoor cell 0xA9B40150**, target (132.43, 17.20, 94). Live
      result.Position = target with `collisionNormalValid = false`. Door
      centered at world XY (132.57, 16.99), BSP radius 1.975, state
-     `0x00010008` = `PERSISTENT_PS | 0x8` (NO `ETHEREAL_PS = 0x4` →
+     `0x00010008` = `HAS_PHYSICS_BSP_PS | REPORT_COLLISIONS_PS` (NO `ETHEREAL_PS = 0x4` →
      **CLOSED**).
    - **Tick 22760** — the working block. Player at (133.14, 18.02, 94)
      in **outdoor cell 0xA9B40029**, target (133.10, 17.60, 94). Live
@@ -68,7 +68,7 @@ Confirmed the door state at the time of every walkthrough:
 | Log line | Event |
 |---|---|
 | 10796 | `[setstate]` door state → `0x0001000C` (PERSISTENT + ETHEREAL = OPEN) |
-| 10993 | `[setstate]` door state → `0x00010008` (PERSISTENT, NOT ethereal = CLOSED) |
+| 10993 | `[setstate]` door state → `0x00010008` (physics BSP + collision reports, NOT ethereal = CLOSED) |
 | 10995–11071 | First and last `[bsp-test]` line on door 0x000F4246. All `state=0x00010008` |
 
 So every `[bsp-test]` hit on the door, and every walkthrough event in