ci: add cron schedule and integration guardian job

[Borda]

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?

What does this PR do?

It enables tracing when tests start to fail, and so determines what change it was

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 89%. Comparing base (00a9a38) to head (39cffd5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #106   +/-   ##
===================================
  Coverage    89%    89%           
===================================
  Files        12     12           
  Lines       499    499           
===================================
  Hits        446    446           
  Misses       53     53           

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