Add CodSpeed continuous performance monitoring

[codspeed-hq]

Summary

This PR integrates CodSpeed for continuous performance monitoring of the PRECIS Framework benchmarks.

Changes Made

• Updated precis-core and precis-profiles to use codspeed-criterion-compat v4.3.0 via dependency renaming
• Created GitHub Actions workflow (.github/workflows/codspeed.yml) to run benchmarks on every push and PR
• Added CodSpeed badge to README for visibility of performance trends
• Configured workflow to use simulation mode with OIDC authentication

Benefits

• Automated performance regression detection in CI
• Detailed flame graphs and execution profiles for performance analysis
• Historical performance trend tracking across commits
• No code changes required in benchmark files - drop-in compatibility layer

Testing

• Verified benchmarks build successfully with cargo codspeed build
• Confirmed benchmarks run correctly with cargo codspeed run
• Validated CodSpeed CLI integration with simulation mode

Next Steps

After merging, CodSpeed will automatically:

1. Start tracking performance metrics for all benchmark runs
2. Generate performance reports on pull requests
3. Create flame graphs for detailed performance analysis

For more information, visit the CodSpeed documentation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.34%. Comparing base (8e6867d) to head (7b9efe8).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   97.81%   95.34%   -2.48%     
==========================================
  Files          18       10       -8     
  Lines        1512      580     -932     
==========================================
- Hits         1479      553     -926     
+ Misses         33       27       -6     

☔ 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.