Add scheduled workflow for testing

[ruicoelhopedro]

Run tests weekly every Tuesday at 08:00 to test for possible regressions via dependency updates.

[Copilot]

Pull Request Overview

Adds a scheduled workflow trigger to run tests weekly on Tuesdays at 08:00 UTC to detect potential regressions from dependency updates.

• Adds a cron schedule trigger to the existing test workflow
• Maintains existing push and pull request triggers

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.05%. Comparing base (a2b0240) to head (678b1cf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #50   +/-   ##
=======================================
  Coverage   95.05%   95.05%           
=======================================
  Files          35       35           
  Lines        3071     3071           
=======================================
  Hits         2919     2919           
  Misses        152      152           

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