Add dedicated health check endpoint

[hmpf]

Scope and purpose

Add an endpoint just for checking if Argus is up and running, returns status 204 and no content.

Contributor Checklist

Every pull request should have this checklist filled out, no matter how small it is.
More information about contributing to Argus can be found in the
Development docs.

• Added a changelog fragment for towncrier
• Added/amended tests for new/changed code
• Added/changed documentation, including updates to the user manual if feature flow or UI is considerably changed
• Linted/formatted the code with ruff and djLint, easiest by using pre-commit
• The first line of the commit message continues the sentence "If applied, this commit will ...", starts with a capital letter, does not end with punctuation and is 50 characters or less long. See our how-to
• If applicable: Created new issues if this PR does not fix the issue completely/there is further work to be done
• If this results in changes in the UI: Added screenshots of the before and after
• If this results in changes to the database model: Updated the ER diagram

[github-actions]

Test results

    8 files  1 720 suites   3m 20s ⏱️
  934 tests   933 ✅ 1 💤 0 ❌
7 472 runs  7 464 ✅ 8 💤 0 ❌

Results for commit dc35edd.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.62%. Comparing base (7c04efb) to head (dc35edd).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1926      +/-   ##
==========================================
+ Coverage   88.60%   88.62%   +0.01%     
==========================================
  Files         146      147       +1     
  Lines        7093     7101       +8     
==========================================
+ Hits         6285     6293       +8     
  Misses        808      808              

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[github-actions]

Test naming convention

All new test names follow the convention. 👍

[lunkwill42]

Looks good, but CI is not happy (SonarCloud and test name checker are complaining).

Other than that, some documentation addition to point out the endpoint exists, for those who want to deploy health checks, would be nice.

[hmpf]

I wish SonarCloud understood #noqa. That specific enpdoint is as safe as it gets. And I don't care for those keywords, as I've said before, and will continue to say.

[hmpf]

Other than that, some documentation addition to point out the endpoint exists, for those who want to deploy health checks, would be nice.

Minimal docs added.

[lunkwill42]

And I don't care for those keywords, as I've said before, and will continue to say.

I doesn't matter what you personally care or don't care for. What matters is what the team agrees upon;

I don't agree, never will, and will die on this hill. Also, we should build thorium power plants.

[sonarqubecloud]

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