add parallel iterator over observer contained in an ObsDataset, add semver check in CI

[FusRoman]

No description provided.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.39%. Comparing base (dd13a22) to head (0d0eac8).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/observation_dataset/parallel.rs	0.00%	16 Missing ⚠️
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #5      +/-   ##
==========================================
- Coverage   92.57%   92.39%   -0.19%     
==========================================
  Files          35       35              
  Lines        8084     8100      +16     
==========================================
  Hits         7484     7484              
- Misses        600      616      +16     

Flag	Coverage Δ
rust	92.39% <0.00%> (-0.19%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ 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.