fix: publish workflow auth — tegwick user, OpenBao token, explicit twine creds

inter-hub-pkg-rep is the Gitea token name (not a username). PACKAGE_USER is
tegwick; token custody is OpenBao platform/operators/inter-hub/package-management.
Disable keyring in CI and pass twine --username/--password explicitly.

.gitea/workflows/publish-python-package.yml

@@ -25,6 +25,7 @@ jobs:
         env:
           TWINE_USERNAME: ${{ secrets.PACKAGE_USER }}
           TWINE_PASSWORD: ${{ secrets.PACKAGE_TOKEN }}
+          PYTHON_KEYRING_BACKEND: keyring.backends.null.Keyring
         run: |
           cd repo
           python3 -m venv .build-venv
@@ -33,5 +34,8 @@ jobs:
           python -m build
           python -m twine check dist/*
           python -m twine upload \
+            --username "${TWINE_USERNAME}" \
+            --password "${TWINE_PASSWORD}" \
+            --non-interactive \
             --repository-url https://gitea.coulomb.social/api/packages/coulomb/pypi \
             dist/*