fix(data): baseline 迁移末尾恢复 search_path 为 public，确保 sqlx 记账正常

crates/aether-data/migrations/20260403000000_baseline.sql

@@ -4579,9 +4579,12 @@ EXCEPTION
   WHEN invalid_table_definition THEN NULL;
 END $mig$;
 
+-- Restore a normal lookup path before sqlx records this migration in the
+-- same transaction. sqlx inserts into `_sqlx_migrations` unqualified.
+SELECT pg_catalog.set_config('search_path', 'public', true);
+
 
 
 --
 -- PostgreSQL database dump complete
 --
-