Add codspeed badge

[bdraco]

codspeed has been very helpful at validating performance enhancements. Its nice that they provide the service free for OSS, so we should recognize their support.

[codspeed-hq]

CodSpeed Performance Report

Merging #9751 will not alter performance

_{Comparing codspeed (13015d4) with master (5a1c3be)}

Summary

✅ 14 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.67%. Comparing base (0d10447) to head (13015d4).
Report is 2 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9751      +/-   ##
==========================================
+ Coverage   97.47%   98.67%   +1.20%     
==========================================
  Files         117      117              
  Lines       35891    35893       +2     
  Branches     4249     4260      +11     
==========================================
+ Hits        34983    35417     +434     
+ Misses        718      320     -398     
+ Partials      190      156      -34     

Flag	Coverage Δ
CI-GHA	98.56% <ø> (+1.16%)	⬆️
OS-Linux	98.24% <ø> (+0.91%)	⬆️
OS-Windows	96.01% <ø> (?)
OS-macOS	97.31% <ø> (+0.08%)	⬆️
Py-3.10.11	97.16% <ø> (+0.30%)	⬆️
Py-3.10.15	97.77% <ø> (+0.76%)	⬆️
Py-3.11.10	97.77% <ø> (+0.71%)	⬆️
Py-3.11.9	97.21% <ø> (+0.30%)	⬆️
Py-3.12.7	98.30% <ø> (+1.22%)	⬆️
Py-3.13.0	98.30% <ø> (+1.22%)	⬆️
Py-3.9.13	97.08% <ø> (?)
Py-3.9.20	97.64% <ø> (?)
Py-pypy7.3.16	97.25% <ø> (?)
VM-macos	97.31% <ø> (+0.08%)	⬆️
VM-ubuntu	98.24% <ø> (+0.91%)	⬆️
VM-windows	96.01% <ø> (?)

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[patchback]

Backport to 3.10: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.10/7c0b463780043b9b5ef8efb379ae1b46e82b3e0f/pr-9751

Backported as #9752

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/7c0b463780043b9b5ef8efb379ae1b46e82b3e0f/pr-9751

Backported as #9753

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.