chore: add Renovate config (python-uv preset)

[lawrence-u10d]

Summary

• Adds renovate.json extending the shared python-uv preset from Unstructured-IO/renovate-config
• Enables automated dependency update PRs for Python (pep621/pyproject.toml), Dockerfiles, and GitHub Actions
• Non-major updates are grouped; major updates get individual PRs
• Vulnerability alerts are prioritized and unscheduled
• Schedule: weekly on Monday mornings (ET)

Test plan

• Verify Renovate bot picks up the config and creates dependency update PRs
• Confirm PR grouping behavior matches expectations

🤖 Generated with Claude Code

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Note

Low Risk
Adds only Renovate configuration; no runtime code paths or production behavior are changed, with risk limited to increased automated dependency-update PR volume.

Overview
Adds renovate.json to enable Renovate dependency automation by extending the shared github>Unstructured-IO/renovate-config:python-uv preset.

^{Written by Cursor Bugbot for commit 06d5712. This will update automatically on new commits. Configure here.}