* rework accounts index to push upsert deeper * clean up return value of upsert_existing_key * upsert_existing_key -> update_key_if_exists * upsert_new_key -> upsert * upsert_item -> lock_and_update_slot_list * update_static -> update_slot_list
* rework accounts index to push upsert deeper * clean up return value of upsert_existing_key * upsert_existing_key -> update_key_if_exists * upsert_new_key -> upsert * upsert_item -> lock_and_update_slot_list * update_static -> update_slot_list