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

src/game/update_field_table.cpp

@@ -19,6 +19,7 @@ struct UFNameEntry {
 
 static const UFNameEntry kUFNames[] = {
     {"OBJECT_FIELD_ENTRY", UF::OBJECT_FIELD_ENTRY},
+    {"OBJECT_FIELD_SCALE_X", UF::OBJECT_FIELD_SCALE_X},
     {"UNIT_FIELD_TARGET_LO", UF::UNIT_FIELD_TARGET_LO},
     {"UNIT_FIELD_TARGET_HI", UF::UNIT_FIELD_TARGET_HI},
     {"UNIT_FIELD_BYTES_0", UF::UNIT_FIELD_BYTES_0},
@@ -52,6 +53,9 @@ static const UFNameEntry kUFNames[] = {
     {"PLAYER_EXPLORED_ZONES_START", UF::PLAYER_EXPLORED_ZONES_START},
     {"GAMEOBJECT_DISPLAYID", UF::GAMEOBJECT_DISPLAYID},
     {"ITEM_FIELD_STACK_COUNT", UF::ITEM_FIELD_STACK_COUNT},
+    {"ITEM_FIELD_DURABILITY", UF::ITEM_FIELD_DURABILITY},
+    {"ITEM_FIELD_MAXDURABILITY", UF::ITEM_FIELD_MAXDURABILITY},
+    {"PLAYER_REST_STATE_EXPERIENCE", UF::PLAYER_REST_STATE_EXPERIENCE},
     {"CONTAINER_FIELD_NUM_SLOTS", UF::CONTAINER_FIELD_NUM_SLOTS},
     {"CONTAINER_FIELD_SLOT_1", UF::CONTAINER_FIELD_SLOT_1},
 };