feat(findings): Optimize findings endpoint

[vicferpoy]

Description

This PR includes a full refactor of the GET /findings endpoint logic, changing the way queries are built using the ORM and DRF-JSON:API library. The include query parameter has also been changed to allow the following values:

• scan
• scan.provider
• resources

Required changes on the UI side have been added and tested as part of this PR.

In addition, few composite and partial indexes have been added. Using our cloud DEV environment, here are the metrics comparison between the former implementation and this one:

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.
• Review if is needed to change the Readme.md

API

• Verify if API specs need to be regenerated.
• Check if version updates are required (e.g., specs, Poetry, etc.).
• Ensure new entries are added to CHANGELOG.md, if applicable.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Attention: Patch coverage is 87.35632% with 11 lines in your changes missing coverage. Please review.

Project coverage is 92.68%. Comparing base (a2c5c71) to head (2efa456).
Report is 16 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7019      +/-   ##
==========================================
+ Coverage   88.66%   92.68%   +4.02%     
==========================================
  Files        1200       76    -1124     
  Lines       34647     6698   -27949     
==========================================
- Hits        30719     6208   -24511     
+ Misses       3928      490    -3438     

Flag	Coverage Δ
api	92.68% <87.35%> (?)
prowler	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	∅ <ø> (∅)
api	92.68% <87.35%> (∅)

[paabloLC]

UI changes looking good!

[jfagoagas]

That's impressive 👏 This is the way to go, thank you for taking care of it ❤️