Use "uv pip compile" to check consistency of requirements

[pavoljuhas]

Problem: pip-tools is compatible with pip-25.3 causing spurious
CI failures (jazzband/pip-tools#2252)

Solution: use uv instead which is self-contained and faster.

[pavoljuhas]

This should prevent failure of the "Check consistency of requirements" CI check such as here -https://github.com/quantumlib/Cirq/actions/runs/19216582078/job/54926897066.

[mhucka]

Nice. I'm taking note that this is something to do in our other repos too.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.38%. Comparing base (2bdbea8) to head (ab0574f).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7745   +/-   ##
=======================================
  Coverage   99.38%   99.38%           
=======================================
  Files        1091     1091           
  Lines       97935    97935           
=======================================
  Hits        97329    97329           
  Misses        606      606           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.