Progress data layer refactoring

[m1r0]

Fixes #

Changes proposed in this Pull Request

Testing instructions

New/Updated Hooks

Deprecated Code

Screenshot / Video

[codecov[bot]]

Codecov Report

Merging #5631 (1b55e86) into trunk (ea8b3e7) will increase coverage by 0.81%. The diff coverage is 83.39%.

@@             Coverage Diff              @@
##              trunk    #5631      +/-   ##
============================================
+ Coverage     44.45%   45.26%   +0.81%     
- Complexity     9053     9249     +196     
============================================
  Files           441      465      +24     
  Lines         32411    32925     +514     
  Branches        274      274              
============================================
+ Hits          14407    14903     +496     
- Misses        17799    17817      +18     
  Partials        205      205              

Impacted Files	Coverage Δ
...ludes/blocks/class-sensei-course-results-block.php	0.00% <0.00%> (ø)
includes/class-sensei-autoloader.php	17.50% <0.00%> (ø)
includes/class-sensei-frontend.php	15.45% <0.00%> (+0.28%)	:arrow_up:
includes/class-sensei-grading.php	11.56% <0.00%> (-0.17%)	:arrow_down:
includes/class-sensei.php	27.16% <0.00%> (-0.40%)	:arrow_down:
...repositories/class-answer-repository-interface.php	0.00% <0.00%> (ø)
.../repositories/class-grade-repository-interface.php	0.00% <0.00%> (ø)
...sitories/class-submission-repository-interface.php	0.00% <0.00%> (ø)
...ies/class-course-progress-repository-interface.php	0.00% <0.00%> (ø)
...ies/class-lesson-progress-repository-interface.php	0.00% <0.00%> (ø)
... and 32 more

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