Ensure every account has exactly one default dashboard

[johannaengland]

Another part of fixing #3150.

As mentioned in there it is possible to delete ones default dashboard and no other is set to be default instead, essentially meaning a user can have no default dashboards. We also observed that it has somehow been possible to set multiple dashboards as default (see #2680), we still don't know how that has been possible and if it is still possible.

This PR adds two migrations:

• the first one will find all accounts that have no default dashboard and set one to default
• the second one will find all accounts that have more than one default dashboard and remove the default marker from all but one

Since it has not been possible to delete the last dashboard (as seen in #3232) we can assume that each account has at least one dashboard.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	992		0	12.96s
✅ PYTHON	ruff	988		0	0.1s

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[github-actions]

Test results

    9 files      9 suites   8m 54s ⏱️
2 143 tests 2 143 ✅ 0 💤 0 ❌
4 025 runs  4 025 ✅ 0 💤 0 ❌

Results for commit 0071357.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.30%. Comparing base (f31d510) to head (0071357).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3236   +/-   ##
=======================================
  Coverage   60.30%   60.30%           
=======================================
  Files         605      605           
  Lines       43685    43685           
  Branches       48       48           
=======================================
  Hits        26343    26343           
  Misses      17330    17330           
  Partials       12       12           

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[stveit]

im guessing the title should be renamed to

Ensure every account has exactly one default dashboard

[lunkwill42]

Just leaving a quick comment before the weekend: This is the weakness of NAV's homegrown migration system: This migration file will conflict with #3231. One of us needs to change our PR accordingly :)

[johannaengland]

Indeed, let's see who it will be 😅

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud