Port to WoW client 12.0.7 (build 68453)

Adapt CypherCore from 11.2.5.63796 to 12.0.7.68453 using TrinityCore as
byte-exact reference.

- Fase 1: build gate 68453 (build_info + build_auth_key SQL, keys from TC)
- Fase 2: Opcodes.cs remapped by name to 12.0.7 values
- Fase 3: 32 DB2 structs + HotfixDatabase.cs SELECTs realigned; fixed
  ReputationManager/SpellInfo refs
- Fase 4: UpdateFields ported (GameObject/Conversation/AreaTrigger/Player/
  Unit/ActivePlayer + nested VisibleItem/QuestLog/BitVectors/CraftingOrderItem/
  SkillInfo)
- Critical protocol fixes: CreateObject header +3 bits (Room/Decor/MeshObject);
  EntityFragment enum renumbered to 12.0.7 (was 11.2.5 values, breaking every
  object packet)
- New-entity foundation: TypeId/TypeMask/HighGuid.MeshObject, fragment tags
- MeshObject entity scaffold (Midnight features are wire-format only)

Builds clean (dotnet build -c Release, 0 errors).

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

Source/Game/Entities/Object/WorldObject.cs

@@ -39,7 +39,7 @@ namespace Game.Entities
             m_movementInfo = new MovementInfo();
             m_updateFlag.Clear();
 
-            m_entityFragments.Add((int)EntityFragment.CGObject, false);
+            m_entityFragments.Add(EntityFragment.CGObject, false);
 
             m_objectData = new ObjectFieldData();
 
@@ -313,6 +313,9 @@ namespace Game.Entities
             data.WriteBit(flags.SceneObject);
             data.WriteBit(flags.ActivePlayer);
             data.WriteBit(flags.Conversation);
+            data.WriteBit(flags.Room);                                              // 12.0.7: new create-header bit
+            data.WriteBit(flags.Decor);                                             // 12.0.7: new create-header bit
+            data.WriteBit(flags.MeshObject);                                        // 12.0.7: new create-header bit
             data.FlushBits();
 
             if (flags.MovementUpdate)
@@ -4047,6 +4050,9 @@ namespace Game.Entities
         public bool SceneObject;
         public bool ActivePlayer;
         public bool Conversation;
+        public bool Room;                                                           // 12.0.7: new
+        public bool Decor;                                                          // 12.0.7: new
+        public bool MeshObject;                                                     // 12.0.7: new
 
         public void Clear()
         {
@@ -4067,6 +4073,9 @@ namespace Game.Entities
             SceneObject = false;
             ActivePlayer = false;
             Conversation = false;
+            Room = false;
+            Decor = false;
+            MeshObject = false;
         }
     }