message: fix: uuid generatiion for mysql fixed
diff: @@ -81,7 +81,7 @@ default_batch_size = int(os.environ.get("BATCH_SIZE", 200))
  # Add uuids directly using built-in SQL uuid function
  add_uuids_by_dialect = {
  - MySQLDialect: """UPDATE %s SET uuid = UNHEX(REPLACE(uuid(), "-", ""));""",
  + MySQLDialect: """UPDATE %s SET uuid = UNHEX(REPLACE(CONVERT(UUID() using utf8mb4), '-', ''));""",
  PGDialect: """UPDATE %s SET uuid = uuid_in(md5(random()::text || clock_timestamp()::text)::cstring);""",
  }
  