Part Test refactor

[SchrodingersGat]

This PR represents a major overhaul of the testing framework in preparation for the 1.0.0 release.

Prior to this change, the PartTestTemplate model was linked to a specific part. So if the user wanted to assign the "same" test to another part (say in a different category) then the template had to be duplicated.

The major change here is to decouple the PartTestTemplate model from the Part model - templates are now generic and can be reused. We then add the PartTest model which links a template to either a Part or PartCategory instance.

Link to Part

If a template is linked to a given part, then test results can be generated for any stock item of that part (or any variants of that part).

Link to Category

If a template is linked to a given category then test results can be generated for any part which lives under that category.

TODO

• Schema and data migrations
• Add migration testing
• Specific migration testing for consolidating duplicate templates
• Fix reverse migration issues
• Fix data fixtures for part tests
• Allow individual tests to be turned on / off (separate to the template)
• Add API endpoints for new PartTest model
• Add data tables for viewing / editing / deleting the PartTest instances against a part
• Add function to determine the tests associated with a given part
• Add API endpoints for filtering PartTest by "part" instance (including inheritance from parent part or category)
• Update UI logic for viewing available tests against a given part
• Update UI logic for viewing available tests against a build order
• Update UI logic for viewing available tests against a stock item
• Fix "copy_tests_from" function on a Part instance
• Fix "copy test_results_from" function on a StockItem instance.
• Ensure test results are copied when serializing a stock item
• Fix existing unit tests
• Add new playwright tests
• Add new API unit tests
• Update CHANGELOG.md
• Update documentation around testing procedures
• Update demo dataset (data migration)
• Prevent duplicate PartTest entries for the same Part
• Prevent duplicate PartTest entries for the same PartCategory
• Allow override of tests based on part category levels
• Ensure correct order of operations for API filters on the PartTest endpoint - the for_part filter must apply first!1

[netlify]

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🔨 Latest commit	c3d9d01
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[SchrodingersGat]

Bumping to the next release target, a lot to think about here which I don't have time for

[codecov]

Codecov Report

❌ Patch coverage is 60.50955% with 62 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.73%. Comparing base (948818b) to head (c3d9d01).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9928      +/-   ##
==========================================
- Coverage   88.05%   87.73%   -0.33%     
==========================================
  Files        1296     1299       +3     
  Lines       59025    59150     +125     
  Branches     1935     1926       -9     
==========================================
- Hits        51974    51893      -81     
- Misses       6570     6776     +206     
  Partials      481      481              

Flag	Coverage Δ
migrations	41.75% <60.50%> (-0.27%)	⬇️

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Components	Coverage Δ
Backend Apps	91.13% <60.25%> (-0.58%)	⬇️
Backend General	93.37% <ø> (ø)
Frontend	71.01% <ø> (+0.09%)	⬆️

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