chore: update version

[ludmilaasb]

Summary

We are promoting 0.9.1a0 to a stable release. Updating the version.

Changes

• Update version file

Checklist

• Tests added or updated to cover the changes
• Documentation updated (docstrings, docs/, CONTRIBUTING.md) if needed
• CHANGELOG / release notes updated if applicable

AI/LLM disclosure

• I did not use LLM tooling, or used it only privately for ideation
• I used the following tool to help write this PR description:
• I used the following tool to generate or modify code:

Important

By opening this PR I confirm that I have read CONTRIBUTING.md and I agree to the terms of the Contributor License Agreement.

Warning

If you're contributing on behalf of your employer, contact cla@algorithmiq.fi to arrange a Corporate CLA.

Summary by CodeRabbit

• Chores
  • Updated the project version from 0.9.1a0 to 0.9.1.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 3ad02bac-51ef-4479-b031-288660faec44

📥 Commits

Reviewing files that changed from the base of the PR and between 25b7465 and f8873e8.

📒 Files selected for processing (1)

• VERSION

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

The project version string changes from pre-release 0.9.1a0 to release 0.9.1.

Changes

Release version update

Layer / File(s)	Summary
Release version declaration VERSION	The version changes from 0.9.1a0 to 0.9.1.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to f8873

This release-only version update presents no identified merge-blocking risk.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the version update in the pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore(dev)/update-version

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_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

Docs preview: https://pr-363.monoprop-docs.pages.dev

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.73%. Comparing base (7e541d2) to head (f8873e8).
⚠️ Report is 26 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #363      +/-   ##
==========================================
+ Coverage   97.70%   97.73%   +0.03%     
==========================================
  Files          14       14              
  Lines         742      752      +10     
  Branches       98      101       +3     
==========================================
+ Hits          725      735      +10     
  Misses         12       12              
  Partials        5        5              

Flag	Coverage Δ
cpp	97.73% <ø> (+0.03%)	⬆️

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

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud