feat: Emit target metrics

[edgarrmondragon]

Closes #1573

---

📚 Documentation preview 📚: https://meltano-sdk--2486.org.readthedocs.build/en/2486/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.70%. Comparing base (64f9e64) to head (8ed29f0).
Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2486      +/-   ##
==========================================
+ Coverage   89.69%   89.70%   +0.01%     
==========================================
  Files          58       58              
  Lines        4831     4848      +17     
  Branches      944      947       +3     
==========================================
+ Hits         4333     4349      +16     
- Misses        347      349       +2     
+ Partials      151      150       -1     

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

[codspeed-hq]

CodSpeed Performance Report

Merging #2486 will not alter performance

_{Comparing 1573-feat-compute-target-metrics (8ed29f0) with main (64f9e64)}

Summary

✅ 6 untouched benchmarks