fix: rebuild CI image when requirements.txt changes

[full-bars]

Summary

• ci-image.yml only rebuilt ghcr.io/full-bars/spc-bot/ci:latest when requirements-dev.txt itself changed as a file.
• requirements-dev.txt pulls in requirements.txt via -r requirements.txt, so dependency additions to requirements.txt (e.g. beautifulsoup4 in feat: /radar — NEXRAD loops with storm-scale zoom, rotation/TVS detection, and PTDS debris-signature scoring #615) never triggered a rebuild, leaving the baked test container stale.
• Add requirements.txt to the path trigger list so both files are watched.

Test plan

• Merge to main and confirm Build and Push CI Image runs and pushes an updated ci:latest
• Confirm PR feat: /radar — NEXRAD loops with storm-scale zoom, rotation/TVS detection, and PTDS debris-signature scoring #615's test job goes green afterward (or manually re-run once image is rebuilt)

Summary by CodeRabbit

• Chores
  • CI image builds now run automatically when requirements.txt changes.

[coderabbitai]

📝 Walkthrough

Walkthrough

The CI image build-and-push workflow now runs when requirements.txt changes.

Changes

CI image workflow

Layer / File(s)	Summary
Update CI image triggers .github/workflows/ci-image.yml	Adds requirements.txt to the workflow’s push path filters.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: rebuilding the CI image when requirements.txt changes.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/ci-image-requirements-trigger

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