Cosmetic Thrall NPC

- Renamed Turret Mode to Guard Mode.
- Guard Mode now keeps the weapon equipped at all times.
- After summoning or changing weapons, the Thrall holds the weapon for approximately 5 seconds before sheathing.
- Guard Mode: Thrall now returns to original position and facing direction after combat ends.
- Equipped items no longer lose durability. Original durability is preserved when items are retrieved.
- Fixed Guard Mode rear attack not working correctly.
- Fixed shields disappearing on unpossess.
- Fixed Thrall switching character class unexpectedly on unpossess after a weapon change.
- Fixed dye color regions applying to wrong areas. Switched from array index to Get Item Custom Color with Color Region pin for accurate per-region mapping.
- Fixed Thralls not attacking on dedicated servers. Root cause: skeletal mesh removal from derived classes prevented weapon attachment via OnRepEquipEvent, leaving Thralls unarmed and unable to attack.