Mise en place de l 'infrastructure de rejet d'envoi de mails non confirmés

[LeSim]

Première partie de #10450

[what-the-diff]

PR Summary

• Email Verification Date Captured
  The system can now record the time a user's email address was verified. This new feature is accomplished by adding a field called email_verified_at in both users and individuals data tables.

• Email Verification Time Auto-Updated
  Enhancement is made to automatically update the email_verified_at time stamp when individuals and users confirm their emails, users are upgraded to instructor or expert roles.

• Pre-filling Verification Time for Current Users
  For existing users and individuals, new scripts were added to prefill the email_verified_at field with the current time.

• Default Users Email Verified
  The creation of new default users now comes with pre-verified email, marked with the creation time as verification time.

• Verification Status Testing Enhanced
  Quality of the new feature is confirmed with advanced tests. The tests are specifically designed to confirm the presence of email_verified_at when a new user is confirmed, promoted, and when an individual is created or modified.

Please note that these changes are only applicable when someone's email address is verified and are saved in the database, meaning no impact on users' practical experience. The addition of the email_verified_at field just increases the depth of user data we have on record.

[codecov]

Codecov Report

Attention: Patch coverage is 4.16667% with 23 lines in your changes are missing coverage. Please review.

Project coverage is 80.81%. Comparing base (dbfd5ee) to head (555df3a).

Files	Patch %	Lines
...nance/prefill_individual_email_verified_at_task.rb	0.00%	10 Missing ⚠️
...maintenance/prefill_user_email_verified_at_task.rb	0.00%	10 Missing ⚠️
app/models/user.rb	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10456      +/-   ##
==========================================
- Coverage   80.90%   80.81%   -0.09%     
==========================================
  Files        1205     1207       +2     
  Lines       25522    25544      +22     
  Branches     4597     4597              
==========================================
- Hits        20648    20644       -4     
- Misses       4874     4900      +26     

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