Add recurring migration job

[merkushin]

Resolves #5437

Proposed Changes

• Add WooCommerce Action Scheduler as a composer package and use it for the background jobs.
• Implement the migration job and the scheduler for it.

Testing Instructions

1. Enable tables_based_progress feature.
2. Go to Sensei LMS -> Tools.
3. Run action for "Migrate comment-based student progress".
4. Refresh the page a few times until you see "Status: Completed." in the description of the tool.

Might be needed to do some cleanup if you tested migration before:

truncate table `wp_sensei_lms_progress`;
delete from `wp_options` where `option_name` = "sensei_migrated_progress_last_comment_id";

Pre-Merge Checklist

• PR title and description contain sufficient detail and accurately describe the changes
• Acceptance criteria is met
• Decisions are publicly documented
• Adheres to coding standards (PHP, JavaScript, CSS, HTML)
• All strings are translatable (without concatenation, handles plurals)
• Follows our naming conventions (P6rkRX-4oA-p2)
• Hooks (p6rkRX-1uS-p2) and functions are documented
• New UIs are responsive and use a mobile-first approach
• New UIs match the designs
• Different user privileges (admin, teacher, subscriber) are tested as appropriate
• Code is tested on the minimum supported PHP and WordPress versions
• User interface changes have been tested on the latest versions of Chrome, Firefox and Safari
• "Needs Documentation" label is added if this change requires updates to documentation
• Known issues are created as new GitHub issues

[fjorgemota]

Just to close the loop, I raised one important thing about this PR on Slack: p1692030035740929-slack-C04A6MB40QN

[codecov]

Codecov Report

Merging #7092 (c3b56a7) into trunk (ca5f34d) will increase coverage by 0.10%.
Report is 52 commits behind head on trunk.
The diff coverage is 91.95%.

@@             Coverage Diff              @@
##              trunk    #7092      +/-   ##
============================================
+ Coverage     49.37%   49.47%   +0.10%     
- Complexity    10543    10569      +26     
============================================
  Files           575      578       +3     
  Lines         44527    44602      +75     
  Branches        402      402              
============================================
+ Hits          21985    22069      +84     
+ Misses        22215    22206       -9     
  Partials        327      327              

Files Changed	Coverage Δ
...d-jobs/class-sensei-scheduler-action-scheduler.php	83.33% <0.00%> (ø)
includes/class-sensei.php	23.14% <0.00%> (-0.28%)	⬇️
...ternal/action-scheduler/class-action-scheduler.php	100.00% <100.00%> (ø)
...er/migrations/class-student-progress-migration.php	81.63% <100.00%> (+0.73%)	⬆️
...nt-progress/jobs/class-migration-job-scheduler.php	100.00% <100.00%> (ø)
...rnal/student-progress/jobs/class-migration-job.php	100.00% <100.00%> (ø)
...al/student-progress/tools/class-migration-tool.php	100.00% <100.00%> (+68.96%)	⬆️

... and 2 files with indirect coverage changes

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[m1r0]

@merkushin I wasn't able to figure out how to make Psalm happy. I would appreciate your help. 🙏

[merkushin]

👍

[merkushin]

Thanks, Miro! Looks good!
Unfortunately, can't approve it as I'm an author of the PR :)

[m1r0]

Unfortunately, can't approve it as I'm an author of the PR :)

😆