Exception type: HTTPError
Message: 403 Client Error: Forbidden for url: https://source.puri.sm/pureos/core/pureos-archive-keyring/-/raw/debian/2026.02.0/keyrings/pureos-archive-keyring.pgp

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/debusine/tasks/_task.py", line 802, in run
    yield
  File "/usr/lib/python3/dist-packages/debusine/tasks/_task.py", line 840, in _execute
    if not self.configure_for_execution(download_directory):
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/debusine/tasks/systembootstrap.py", line 279, in configure_for_execution
    host_sources = self._generate_deb822_sources(
        self.data.bootstrap_repositories,
        keyrings_dir=keyrings_dir,
        use_signed_by=self.data.bootstrap_options.use_signed_by,
    )
  File "/usr/lib/python3/dist-packages/debusine/tasks/systembootstrap.py", line 173, in _generate_deb822_sources
    self._deb822_source(
    ~~~~~~~~~~~~~~~~~~~^
        repository,
        ^^^^^^^^^^^
    ...<2 lines>...
        http_timeout=self.http_timeout or DEFAULT_REQUEST_TIMEOUT,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/lib/python3/dist-packages/debusine/tasks/systembootstrap.py", line 143, in _deb822_source
    key_file = SystemBootstrap._download_key(
        repository, keyring_directory=keyring_directory
    )
  File "/usr/lib/python3/dist-packages/debusine/tasks/systembootstrap.py", line 79, in _download_key
    keyring, actual_sha256sum = get_url_contents_sha256sum(
                                ~~~~~~~~~~~~~~~~~~~~~~~~~~^
        str(repo_keyring.url), 100 * 1024 * 1024, allow_file=True
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/lib/python3/dist-packages/debusine/client/client_utils.py", line 176, in get_url_contents_sha256sum
    r.raise_for_status()
    ~~~~~~~~~~~~~~~~~~^^
  File "/usr/lib/python3/dist-packages/requests/models.py", line 1024, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 403 Client Error: Forbidden for url: https://source.puri.sm/pureos/core/pureos-archive-keyring/-/raw/debian/2026.02.0/keyrings/pureos-archive-keyring.pgp