release: bump version to 0.9.0

[tombonfert]

Summary

Release version 0.9.0

Changes

Test Plan

• Unit tests added/updated
• Manual testing completed
• Documentation updated (if applicable)

Checklist

• Code follows project style guidelines
• Self-review completed
• No new linter warnings introduced

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.17%. Comparing base (e26b13a) to head (f24c717).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #120   +/-   ##
=======================================
  Coverage   90.17%   90.17%           
=======================================
  Files          66       66           
  Lines        6003     6003           
  Branches      755      755           
=======================================
  Hits         5413     5413           
  Misses        467      467           
  Partials      123      123           

Flag	Coverage Δ
query_engine	86.66% <ø> (ø)
reporting	94.78% <ø> (ø)

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