RE2022-116: Add selection state update method

[MrCreosote]

Also DRY up the 3 state update methods.

[github-advanced-security]

You have successfully added a new Trivy configuration .github/workflows/pr_build.yml:build-image. As part of the setup process, we have scanned this repository and found 2 existing alerts. Please check the repository Security tab to see all alerts.

[codecov]

Codecov Report

Patch coverage: 53.33% and project coverage change: +0.13 🎉

Comparison is base (63335ff) 47.66% compared to head (a75012d) 47.80%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #190      +/-   ##
==========================================
+ Coverage   47.66%   47.80%   +0.13%     
==========================================
  Files          45       45              
  Lines        3040     3048       +8     
==========================================
+ Hits         1449     1457       +8     
  Misses       1591     1591              

Impacted Files	Coverage Δ
src/service/storage_arango.py	25.14% <25.00%> (+0.51%)	⬆️
src/service/routes_collections.py	47.26% <50.00%> (+0.02%)	⬆️
src/service/models.py	92.46% <100.00%> (+0.26%)	⬆️

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[MrCreosote]

Ugh, one of those trivy alerts is for httpx, which is pinned to < 19.0 by aioarango, which #163

[dauglyon]

This all LGTM... but I can't say I am confident in my ability to be confident about AQL. That said, LGTM