Add Claude AI security review for PRs

[velo]

Summary

• Add Claude AI security review GitHub Action that runs on every PR
• Uses claude-sonnet-4-6 to review code changes for security issues only
• Tailored security prompt for this project's tech stack

Test plan

• Verify workflow YAML syntax is valid
• Open a test PR to confirm the action runs
• Verify the action uses the correct model and prompt

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 13.01%. Comparing base (9f71918) to head (7c16f4c).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1919   +/-   ##
=========================================
  Coverage     13.01%   13.01%           
  Complexity      752      752           
=========================================
  Files           585      585           
  Lines         16552    16552           
  Branches       1920     1920           
=========================================
  Hits           2154     2154           
  Misses        14199    14199           
  Partials        199      199           

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[ferenc-csaky]

I'm reluctant about this. We can try this, but if this will be as crappy as copilot it will be just annoying noise.

[velo]

I'm reluctant about this. We can try this, but if this will be as crappy as copilot it will be just annoying noise.

Absolutely with you. If becomes a copilot I will take it out.

[ferenc-csaky]

Assuming CI is green