Auto State Bucket Creation is Failing

[ephur]

When specifying a state bucket that does not exist, the worker will attempt to automatically create it (when --create-backend-bucket is specified, which is the default value; though consider flipping the default).

A stack trace is generated, this was likely never tested properly after refactoring the backend handlers, and removing this functionality from the authenticator to the handler.

Traceback (most recent call last):
  File "/Users/ephur/.pyenv/versions/sigilstack-bootstrap/bin/worker", line 8, in <module>
    sys.exit(cli())
             ~~~^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/click/core.py", line 1442, in __call__
    return self.main(*args, **kwargs)
           ~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/click/core.py", line 1363, in main
    rv = self.invoke(ctx)
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/click/core.py", line 1830, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/click/core.py", line 1226, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/click/core.py", line 794, in invoke
    return callback(*args, **kwargs)
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/click/decorators.py", line 34, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/tfworker/cli.py", line 100, in terraform
    tfc = TerraformCommand(deployment=deployment)
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/tfworker/commands/base.py", line 71, in __init__
    self._app_state.backend = _init_backend_(self._app_state)
                              ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/tfworker/commands/base.py", line 186, in _init_backend_
    be = _select_backend(
        backend_config,
        app_state.deployment,
        app_state.authenticators,
    )
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/tfworker/commands/base.py", line 217, in _select_backend
    return backend.value(authenticators, deployment=deployment)
           ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/tfworker/backends/s3.py", line 78, in __init__
    self._ensure_backend_bucket()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Users/ephur/.pyenv/versions/3.13.3/envs/sigilstack-bootstrap/lib/python3.13/site-packages/tfworker/backends/s3.py", line 439, in _ensure_backend_bucket
    self._create_bucket(self._authenticator.bucket)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'AWSAuthenticator' object has no attribute 'bucket'