[Zone] Zone State Improvements Part 3 (#4773)

* [Zone State] Additional improvements

* Return early

* Update zone_save_state.cpp

* Push

* Push

* Update zone.cpp

* Update zone_save_state.cpp

* Equip items that were dynamically added on restore

* IsZoneStateValid helper

* ZoneStateSpawnsRepository::PurgeInvalidZoneStates

* Add Zone:StateSaveClearDays and PurgeOldZoneStates

* spawn2 / unique_spawn block when restored from zone state

* One time purge

* Update zone_state_spawns_repository.h

* Update npc.cpp

* Update npc.cpp

* test

* ORDER BY spawn2_id

* Stuff

* Restored corpses shouldn't trigger events

* Fix weird edge case

common/database/database_update_manifest.cpp

@@ -6980,7 +6980,7 @@ ALTER TABLE data_buckets ADD INDEX idx_bot_expires (bot_id, expires);
 	},
 	ManifestEntry{
 		.version = 9313,
-		.description = "2025_03_11_data_bucket_indexes.sql",
+		.description = "2025_03_11_zone_state_spawns.sql",
 		.check = "SHOW INDEX FROM zone_state_spawns",
 		.condition = "missing",
 		.match = "idx_zone_instance",
@@ -6990,6 +6990,17 @@ ALTER TABLE zone_state_spawns ADD INDEX idx_instance_id (instance_id);
 )",
 	.content_schema_update = false
 	},
+	ManifestEntry{
+		.version = 9314,
+		.description = "2025_03_12_zone_state_spawns_one_time_truncate.sql",
+		.check = "SELECT * FROM db_version WHERE version >= 9314",
+		.condition = "empty",
+		.match = "",
+		.sql = R"(
+TRUNCATE TABLE zone_state_spawns;
+)",
+		.content_schema_update = false
+	},
 // -- template; copy/paste this when you need to create a new entry
 //	ManifestEntry{
 //		.version = 9228,