The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/workspace/.venv/bin/alembic", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/config.py", line 641, in main
    CommandLine(prog=prog).main(argv=argv)
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/config.py", line 631, in main
    self.run_cmd(cfg, options)
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/config.py", line 608, in run_cmd
    fn(
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/command.py", line 236, in revision
    script_directory.run_env()
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/script/base.py", line 583, in run_env
    util.load_python_file(self.dir, "env.py")
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/util/pyfiles.py", line 95, in load_python_file
    module = load_module_py(module_id, path)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/alembic/util/pyfiles.py", line 113, in load_module_py
    spec.loader.exec_module(module)  # type: ignore
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/workspace/./src/backend/alembic/env.py", line 88, in <module>
    run_migrations_online()
  File "/workspace/./src/backend/alembic/env.py", line 74, in run_migrations_online
    with connectable.connect() as connection:
         ^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 3280, in connect
    return self._connection_cls(self)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 148, in __init__
    Connection._handle_dbapi_exception_noconnection(
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 2444, in _handle_dbapi_exception_noconnection
    raise sqlalchemy_exception.with_traceback(exc_info[2]) from e
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 146, in __init__
    self._dbapi_connection = engine.raw_connection()
                             ^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/base.py", line 3304, in raw_connection
    return self.pool.connect()
           ^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 449, in connect
    return _ConnectionFairy._checkout(self)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 1263, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 712, in checkout
    rec = pool._do_get()
          ^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/impl.py", line 308, in _do_get
    return self._create_connection()
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 390, in _create_connection
    return _ConnectionRecord(self)
           ^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 674, in __init__
    self.__connect()
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 900, in __connect
    with util.safe_reraise():
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/util/langhelpers.py", line 146, in __exit__
    raise exc_value.with_traceback(exc_tb)
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/pool/base.py", line 896, in __connect
    self.dbapi_connection = connection = pool._invoke_creator(self)
                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/create.py", line 643, in connect
    return dialect.connect(*cargs, **cparams)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/sqlalchemy/engine/default.py", line 617, in connect
    return self.loaded_dbapi.connect(*cargs, **cparams)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/workspace/.venv/lib/python3.11/site-packages/psycopg2/__init__.py", line 122, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) connection to server at "db" (172.19.0.2), port 5433 failed: Connection refused
        Is the server running on that host and accepting TCP/IP connections?

(Background on this error at: https://sqlalche.me/e/20/e3q8)
make: *** [Makefile:16: migration] Error 1