* Save spawns
* Update base_zone_state_spawns_repository.h
* Zone state save work
* Code cleanup
* More cleanup
* Database migration
* Update database_update_manifest.cpp
* Revert decay at storage model
* Code cleanup
* More cleanup
* More cleanup
* More cleanup
* Entity variables
* Add entity variables to the schema
* Post rebase
* Checkpoint
* Serialize / deserialize buffs
* Current hp / mana / end save / load
* Save / load current_waypoint
* Add zone spawn protection
* Finishing touches
* Cleanup
* Update zone_save_state.cpp
* Cleanup
* Update zone_save_state.cpp
* Update npc.cpp
* Update npc.cpp
* More
* Update perl_npc.cpp
* Update zone_loot.cpp