feat(ci): add version-bump workflow for Renovate PRs

[lawrence-u10d]

Summary

• Adds automated version bumping for Renovate dependency update PRs
• Uses the shared reusable workflow from Unstructured-IO/infra
• Automatically bumps __version__.py, updates CHANGELOG.md, and refreshes uv.lock

How it works

When Renovate opens or updates a PR, this workflow:

1. Detects which components were changed
2. Parses conventional commit messages to determine bump type (major/minor/patch)
3. Bumps the version, updates changelog, and commits back to the PR branch

🤖 Generated with Claude Code

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Note

Low Risk
Low risk: adds a new GitHub Actions workflow only, gated to run on PRs opened/updated by utic-renovate[bot]. Main risk is unintended PR-branch writes (version/changelog/lockfile) if the reusable workflow or bot identity/permissions are misconfigured.

Overview
Adds a new GitHub Actions workflow (.github/workflows/version-bump.yml) that runs on pull_request events targeting main and only for PRs opened/updated by utic-renovate[bot].

The job delegates to the shared reusable workflow Unstructured-IO/infra/.github/workflows/version-bump.yml@main, configured to default to a patch bump and to update the changelog and lockfile, using repo secrets/vars to authenticate and access the private PyPI index.

^{Written by Cursor Bugbot for commit 4cd1dd0. This will update automatically on new commits. Configure here.}

[awalker4]

Love it!