feat: propagate OBJECT_FIELD_SCALE_X through creature and GO spawn pipeline

Reads OBJECT_FIELD_SCALE_X (field 4, cross-expansion) from CREATE_OBJECT
update fields and passes it through the full creature and game object spawn
chain: game_handler callbacks → pending spawn structs → async load results
→ createInstance() calls. This gives boss giants, gnomes, children, and
other non-unit-scale NPCs correct visual size, and ensures scaled GOs
(e.g. large treasure chests, oversized plants) render at the server-specified
scale rather than always at 1.0.

- Added OBJECT_FIELD_SCALE_X to UF enum and all expansion update_fields.json
- Added float scale to CreatureSpawnCallback and GameObjectSpawnCallback
- Propagated scale through PendingCreatureSpawn, PreparedCreatureModel,
  PendingGameObjectSpawn, PreparedGameObjectWMO
- Used scale in charRenderer/m2Renderer/wmoRenderer createInstance() calls
- Sanity-clamped raw float to [0.01, 100.0] range before use

include/core/application.hpp

@@ -98,7 +98,7 @@ private:
     void loadOnlineWorldTerrain(uint32_t mapId, float x, float y, float z);
     void buildFactionHostilityMap(uint8_t playerRace);
     pipeline::M2Model loadCreatureM2Sync(const std::string& m2Path);
-    void spawnOnlineCreature(uint64_t guid, uint32_t displayId, float x, float y, float z, float orientation);
+    void spawnOnlineCreature(uint64_t guid, uint32_t displayId, float x, float y, float z, float orientation, float scale = 1.0f);
     void despawnOnlineCreature(uint64_t guid);
     bool tryAttachCreatureVirtualWeapons(uint64_t guid, uint32_t instanceId);
     void spawnOnlinePlayer(uint64_t guid,
@@ -113,7 +113,7 @@ private:
     void despawnOnlinePlayer(uint64_t guid);
     void buildCreatureDisplayLookups();
     std::string getModelPathForDisplayId(uint32_t displayId) const;
-    void spawnOnlineGameObject(uint64_t guid, uint32_t entry, uint32_t displayId, float x, float y, float z, float orientation);
+    void spawnOnlineGameObject(uint64_t guid, uint32_t entry, uint32_t displayId, float x, float y, float z, float orientation, float scale = 1.0f);
     void despawnOnlineGameObject(uint64_t guid);
     void buildGameObjectDisplayLookups();
     std::string getGameObjectModelPathForDisplayId(uint32_t displayId) const;
@@ -214,6 +214,7 @@ private:
         uint32_t displayId;
         uint32_t modelId;
         float x, y, z, orientation;
+        float scale = 1.0f;
         std::shared_ptr<pipeline::M2Model> model; // parsed on background thread
         std::unordered_map<std::string, pipeline::BLPImage> predecodedTextures; // decoded on bg thread
         bool valid = false;
@@ -300,6 +301,7 @@ private:
         uint64_t guid;
         uint32_t displayId;
         float x, y, z, orientation;
+        float scale = 1.0f;
     };
     std::deque<PendingCreatureSpawn> pendingCreatureSpawns_;
     static constexpr int MAX_SPAWNS_PER_FRAME = 3;
@@ -393,6 +395,7 @@ private:
         uint32_t entry;
         uint32_t displayId;
         float x, y, z, orientation;
+        float scale = 1.0f;
     };
     std::vector<PendingGameObjectSpawn> pendingGameObjectSpawns_;
     void processGameObjectSpawnQueue();
@@ -403,6 +406,7 @@ private:
         uint32_t entry;
         uint32_t displayId;
         float x, y, z, orientation;
+        float scale = 1.0f;
         std::shared_ptr<pipeline::WMOModel> wmoModel;
         std::unordered_map<std::string, pipeline::BLPImage> predecodedTextures; // decoded on bg thread
         bool valid = false;

include/game/game_handler.hpp

@@ -735,8 +735,8 @@ public:
     void setHearthstonePreloadCallback(HearthstonePreloadCallback cb) { hearthstonePreloadCallback_ = std::move(cb); }
 
     // Creature spawn callback (online mode - triggered when creature enters view)
-    // Parameters: guid, displayId, x, y, z (canonical), orientation
-    using CreatureSpawnCallback = std::function<void(uint64_t guid, uint32_t displayId, float x, float y, float z, float orientation)>;
+    // Parameters: guid, displayId, x, y, z (canonical), orientation, scale (OBJECT_FIELD_SCALE_X)
+    using CreatureSpawnCallback = std::function<void(uint64_t guid, uint32_t displayId, float x, float y, float z, float orientation, float scale)>;
     void setCreatureSpawnCallback(CreatureSpawnCallback cb) { creatureSpawnCallback_ = std::move(cb); }
 
     // Creature despawn callback (online mode - triggered when creature leaves view)
@@ -766,8 +766,8 @@ public:
     void setPlayerEquipmentCallback(PlayerEquipmentCallback cb) { playerEquipmentCallback_ = std::move(cb); }
 
     // GameObject spawn callback (online mode - triggered when gameobject enters view)
-    // Parameters: guid, entry, displayId, x, y, z (canonical), orientation
-    using GameObjectSpawnCallback = std::function<void(uint64_t guid, uint32_t entry, uint32_t displayId, float x, float y, float z, float orientation)>;
+    // Parameters: guid, entry, displayId, x, y, z (canonical), orientation, scale (OBJECT_FIELD_SCALE_X)
+    using GameObjectSpawnCallback = std::function<void(uint64_t guid, uint32_t entry, uint32_t displayId, float x, float y, float z, float orientation, float scale)>;
     void setGameObjectSpawnCallback(GameObjectSpawnCallback cb) { gameObjectSpawnCallback_ = std::move(cb); }
 
     // GameObject move callback (online mode - triggered when gameobject position updates)

include/game/update_field_table.hpp

@@ -14,6 +14,7 @@ namespace game {
 enum class UF : uint16_t {
     // Object fields
     OBJECT_FIELD_ENTRY,
+    OBJECT_FIELD_SCALE_X,
 
     // Unit fields
     UNIT_FIELD_TARGET_LO,