Core/Housing: add owned room removal persistence API

src/server/game/Housing/HousingRoomPersistence.h

@@ -14,9 +14,9 @@ class Player;
 
 namespace Housing
 {
-    // Read/validation layer for housing_room_entity. Stage 5 deliberately keeps
-    // room mutation and opcode activation out until HouseRoom client data is safe
-    // for build 12.1.0.69587.
+    // Persistence/validation layer for housing_room_entity. Room template creation
+    // remains fail-closed until the verified 12.1.0.69587 HouseRoom store is loaded;
+    // ownership-safe removal does not depend on trusting a client-supplied template id.
     class TC_GAME_API RoomPersistence
     {
     public:
@@ -25,10 +25,17 @@ namespace Housing
         std::vector<RoomState> LoadOwnedRooms(Player const* player, ObjectGuid const& houseGuid) const;
         Result LoadOwnedRoom(Player const* player, ObjectGuid const& roomGuid, RoomState& state) const;
 
+        // Removes one already-persisted room owned by the player. Child live entity
+        // GUIDs are snapshotted before the transaction so the caller can despawn them
+        // through Map ownership after persistence succeeds. Placed room decor is
+        // returned to storage instead of being destroyed.
+        Result RemoveOwnedRoom(Player const* player, ObjectGuid const& roomGuid, RoomState& removedState,
+            std::vector<ObjectGuid>& childEntityGuids) const;
+
         bool IsSafePersistedRoom(RoomState const& state) const;
 
-        // Fail-closed gate for future room mutation handlers. The DB2Storage table
-        // hash is assigned only after a successful load, so a disabled/stale
+        // Fail-closed gate for future room creation/mutation handlers. The DB2Storage
+        // table hash is assigned only after a successful load, so a disabled/stale
         // HouseRoom store can never be mistaken for ready client data.
         bool IsRoomTemplateStoreReady() const;
         bool IsKnownRoomTemplate(uint32 houseRoomId) const;