Make both distributions fit to publish

The release workflow was already right; what it would have uploaded was not.
`fluksio` had no readme, so its PyPI page would have been blank — the app
repo's own README is a contributor's map of `frontend/` and `docker/`, which
is the wrong front page for `pip install fluksio`. It now has one of its own,
aimed at somebody who landed on the project page. Both distributions gain
authors, urls, keywords and classifiers; `twine check` passes clean on all
four artifacts where it warned on two before.

The workflow publishes `fluksio-worker` first, because `fluksio` depends on it
and the other order leaves a few seconds — the whole of a first release — in
which the dependency cannot be resolved. `--check-url` makes a re-run skip
what is already uploaded rather than failing on it, which matters because a
version on PyPI can never be replaced.

Licence metadata is deliberately still absent: LICENSE is MIT in somebody
else's name, inherited from the template this was scaffolded from, and whose
it should be is not a decision to make in a commit. NOTEPAD carries it.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012ue1tkFWB1bcGy3aWhCKpU

.gitea/workflows/publish.yml

@@ -42,4 +42,15 @@ jobs:
       - name: Publish
         env:
           UV_PUBLISH_TOKEN: ${{ secrets.PYPI_TOKEN }}
-        run: uv publish dist/*
+        # The worker first: `fluksio` depends on it, and for the seconds
+        # between two uploads the other order leaves a dependency that cannot
+        # be resolved — which on a first release is the whole of the window in
+        # which the package exists at all.
+        #
+        # `--check-url` makes a re-run skip what is already up there rather
+        # than failing on it, so a job that died between the two uploads can
+        # simply be run again. A version on PyPI can never be replaced, and
+        # this is the difference between retrying and burning a version.
+        run: |
+          uv publish --check-url https://pypi.org/simple/ dist/fluksio_worker-*
+          uv publish --check-url https://pypi.org/simple/ dist/fluksio-0*