ci: add testing cron

[Borda]

What does this PR do?

This will help to discover some failing compatibility from dependency releases early
could help discover issues like #584

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in GitHub issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85%. Comparing base (a7b5910) to head (c61c4b2).
Report is 31 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff          @@
##           main   #585    +/-   ##
====================================
- Coverage    85%    85%    -0%     
====================================
  Files        38     39     +1     
  Lines      2901   3017   +116     
====================================
+ Hits       2479   2564    +85     
- Misses      422    453    +31     

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[Copilot]

Pull Request Overview

This PR adds a scheduled cron job trigger to the CI testing workflow to run tests daily at midnight UTC. This proactive testing approach will help detect compatibility issues with dependency releases before they affect active development.

• Adds a daily scheduled trigger to the existing CI testing workflow