feat(D.5.4): PlayerDescription = membership manifest; drop WeenieClassId=ContainerType misuse

The old seeding block set WeenieClassId = inv.ContainerType (a 0/1/2
container-kind discriminator, not a weenie class id) and used MoveItem
for the equipped block. Replace both loops with RecordMembership calls:
inventory guids get a bare stub (WeenieClassId stays 0); equipped guids
get the equip slot set directly. Weenie data arrives via CreateObject /
ObjectTableWiring, not PlayerDescription.

New test PlayerDescription_SeedsMembership_NotWeenieClassIdMisuse proves:
(a) inv guid is registered, (b) WeenieClassId==0 not ContainerType, and
(c) equipped guid CurrentlyEquippedLocation is set to MeleeWeapon.
No existing tests pinned the old behavior; all 15 GameEventWiringTests pass.

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

tests/AcDream.Core.Net.Tests/GameEventWiringTests.cs

@@ -375,6 +375,58 @@ public sealed class GameEventWiringTests
         Assert.NotNull(items.Get(0x50000A02u));
     }
 
+    [Fact]
+    public void PlayerDescription_SeedsMembership_NotWeenieClassIdMisuse()
+    {
+        // D.5.4: PlayerDescription is a membership MANIFEST, not the data
+        // source. The old code set WeenieClassId = inv.ContainerType (a
+        // 0/1/2 discriminator), which is a misuse. After the fix, the
+        // registered stub has WeenieClassId == 0 and the equipped item's
+        // CurrentlyEquippedLocation is set to MeleeWeapon (0x1).
+        // Uses the SAME wire fixture as PlayerDescription_RegistersInventoryEntries_InClientObjectTable.
+        var dispatcher = new GameEventDispatcher();
+        var items      = new ClientObjectTable();
+        var combat     = new CombatState();
+        var spellbook  = new Spellbook();
+        var chat       = new ChatLog();
+        GameEventWiring.WireAll(dispatcher, items, combat, spellbook, chat);
+
+        var sb = new MemoryStream();
+        using var w = new BinaryWriter(sb);
+        w.Write(0u);     // propertyFlags = 0
+        w.Write(0x52u);  // weenieType
+        w.Write(0x201u); // vectorFlags = ATTRIBUTE | ENCHANTMENT
+        w.Write(1u);     // has_health
+        w.Write(0u);     // attribute_flags = 0 (no attrs)
+        w.Write(0u);     // enchantment_mask = 0
+
+        w.Write(0u);     // option_flags = None (no GAMEPLAY_OPTIONS → strict inv path)
+        w.Write(0u);     // options1
+        w.Write(0u);     // legacy hotbar list count = 0
+        w.Write(0u);     // spellbook_filters
+
+        // Inventory: 1 entry with ContainerType=1 (the OLD code would have
+        // set WeenieClassId=1; the new code must leave WeenieClassId==0).
+        w.Write(1u);
+        w.Write(0x700u); w.Write(1u);  // guid=0x700, ContainerType=1
+
+        // Equipped: 1 entry with EquipLocation = MeleeWeapon (0x1).
+        // Wire format: guid(4) + loc(4) + priority(4) = 12 bytes per entry.
+        w.Write(1u);
+        w.Write(0x701u); w.Write((uint)EquipMask.MeleeWeapon); w.Write(0u);  // guid=0x701, slot=MeleeWeapon, prio=0
+
+        var env = GameEventEnvelope.TryParse(WrapEnvelope(GameEventType.PlayerDescription, sb.ToArray()));
+        dispatcher.Dispatch(env!.Value);
+
+        // (a) inventory guid is registered
+        Assert.NotNull(items.Get(0x700u));
+        // (b) WeenieClassId must be 0, NOT the ContainerType discriminator (1) — misuse gone
+        Assert.Equal(0u, items.Get(0x700u)!.WeenieClassId);
+        // (c) equipped guid has its equip slot set
+        Assert.NotNull(items.Get(0x701u));
+        Assert.Equal(EquipMask.MeleeWeapon, items.Get(0x701u)!.CurrentlyEquippedLocation);
+    }
+
     [Fact]
     public void WireAll_PlayerDescription_invokesOnShortcuts()
     {