[Corpses] Add corpse entity variables to DB (#4911)

* [Corpses] Add corpse entity variables to DB

- When corpses have entity variables add/remove/modified it will update the database accordingly.
- Corpse loading will pull the database values if they exist.

* Updates per review

* Update version.h

---------

Co-authored-by: Chris Miles <akkadius1@gmail.com>

common/database/database_update_manifest.cpp

@@ -7121,6 +7121,18 @@ ADD COLUMN `first_login` int(11) UNSIGNED NOT NULL DEFAULT 0 AFTER `xtargets`;
 		.sql = R"(
 ALTER TABLE player_event_logs ROW_FORMAT=COMPRESSED;
 CREATE INDEX idx_event_type_char_id ON player_event_logs (event_type_id, character_id);
+)",
+		.content_schema_update = false
+	},
+	ManifestEntry{
+		.version = 9325,
+		.description = "2025_06_10_character_corpses_entity_variables.sql",
+		.check = "SHOW COLUMNS FROM `character_corpses` LIKE 'entity_variables'",
+		.condition = "empty",
+		.match = "",
+		.sql = R"(
+ALTER TABLE `character_corpses`
+ADD COLUMN `entity_variables` TEXT DEFAULT NULL AFTER `rezzable`;
 )",
 		.content_schema_update = false
 	},