ci: enable Dependabot for github-actions and uv ecosystems#13
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Introduce `.github/dependabot.yml` with two ecosystems: - `github-actions`: one weekly PR containing all pending action updates. Grouping is safe now that every `uses:` reference is SHA-pinned (trailing `# vX.Y.Z` comment makes each bump readable). - `uv`: Dependabot's native ecosystem for `pyproject.toml` + `uv.lock`, which regenerates the lock file as part of each PR. Minor and patch bumps are grouped so unrelated routine bumps arrive together; majors are intentionally ungrouped so each one can be reviewed on its own. Both ecosystems: weekly cadence, `chore` commit prefix to match Conventional Commits, and a `dependencies` label so PRs are easy to filter. No `open-pull-requests-limit` — grouping already keeps the volume predictable.
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Summary
Introduce
.github/dependabot.ymlto keep GitHub Actions and Python dependencies current on a weekly cadence.Ecosystems
github-actionsOne grouped weekly PR covering every pending action bump. Grouping is safe because every
uses:reference inci.ymlandpublish.ymlis SHA-pinned with a trailing# vX.Y.Zcomment (see the companionci/pin-actions-by-shachange): each bump is a mechanical SHA rotation with a matching version-comment update, and the workflows themselves cover correctness.uvDependabot's native
uvecosystem — now GA — readspyproject.tomland regeneratesuv.lockas part of each update PR. This is preferable topackage-ecosystem: "pip", which would leaveuv.lockout of date after each bump.Grouping strategy:
Conventions
schedule.interval: "weekly"— cadence matches the Dependabot options reference.commit-message.prefix: "chore"— aligns with the repository's Conventional Commits style.labels: ["dependencies"]— default label so Dependabot PRs are easy to filter.open-pull-requests-limit— grouping already bounds the volume; an arbitrary cap would hide updates instead of organising them.