Improve speed of front page ‘recent problems’ query

[davea]

No description provided.

[codecov]

Codecov Report

Merging #4424 (10995ee) into master (051c9dc) will increase coverage by 0.00%.
The diff coverage is 62.50%.

❗ Current head 10995ee differs from pull request most recent head 30a1804. Consider uploading reports for the commit 30a1804 to get more accurate results

@@           Coverage Diff           @@
##           master    #4424   +/-   ##
=======================================
  Coverage   82.62%   82.62%           
=======================================
  Files         364      364           
  Lines       27471    27472    +1     
  Branches     4273     4276    +3     
=======================================
+ Hits        22697    22699    +2     
+ Misses       3489     3486    -3     
- Partials     1285     1287    +2     

Impacted Files	Coverage Δ
perllib/FixMyStreet/DB/ResultSet/Problem.pm	95.90% <62.50%> (-2.39%)	⬇️

... and 1 file with indirect coverage changes

[dracos]

Odd test failure to investigate, and possible defaults to set - though as I say there, perhaps db sort is enough, and don't bother then sorting by confirmed. If you had:

id | created | confirmed
1 | 2023-05-10T08:00 | 2023-05-10T14:00
2 | 2023-05-10T09:00 | 2023-05-10T09:00
3 | 2023-05-10T10:00 | 2023-05-10T11:30
4 | 2023-05-10T11:00 | 2023-05-10T11:00
5 | 2023-05-10T12:00 | 2023-05-10T12:00
6 | 2023-05-10T13:00 | 2023-05-10T13:00

Before PR: 1, 6, 5, 3, 2
With PR: 6, 5, 3, 4, 2
With PR but no code sorting: 6, 5, 4, 3, 2
Not sure it matters if they're displaying as the last rather than the middle :shrug: :)

[davea]

Thanks for spotting the Zürich thing, fixed that in 10995ee. Might have fixed the test failure too, let's see.

I think it's worth ensuring they're ordered nicely. I know it's just a tiny thing but having something like this on the front page feels wrong: