test(app): D.2b-B B-Wire — burden wire-first + live-refresh tests + review notes

Final-review response. Adds the spec §5 / Task-16 burden end-to-end coverage
the per-task plan missed: (1) burden reads wire EncumbranceVal over the carried
sum (asserts 50% from wire 7500, not 20% from sum 3000 — retires AP-48's
fallback as the primary), (2) a live player-int update repaints the bar (60%),
which only happens via the C1d Concerns `o.ObjectId == p` branch. Both are
discriminating (fail if the respective branch is reverted).

Plus two clarifying comments from the review: the 0x02CD player route depends on
the login PD upsert having created the player object (no-ops, no phantom, if
not); and a TODO that the container-open phase must treat ViewContents as a full
replace, not the additive merge used here.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/AcDream.Core.Net/ObjectTableWiring.cs

@@ -34,7 +34,10 @@ public static class ObjectTableWiring
 
         // B-Wire: PrivateUpdatePropertyInt (0x02CD) carries no guid — it targets the
         // local player. Route it to the player object so live EncumbranceVal updates the
-        // burden bar. (No-op if the player guid isn't wired yet.)
+        // burden bar. The player ClientObject is created at login by the PD UpsertProperties
+        // call (which precedes any live 0x02CD), so UpdateIntProperty finds it. If it somehow
+        // hasn't yet, this no-ops (UpdateIntProperty returns false on an unknown guid) rather
+        // than creating a phantom — the next PD / CreateObject seeds it.
         session.PlayerIntPropertyUpdated += u =>
         {
             if (playerGuid is not null)