editoast: switch to diesel_async

[Tristramg]

Closes #4829

[codecov]

Codecov Report

Merging #4809 (6c0e58c) into dev (21e3e16) will decrease coverage by 0.04%.
Report is 2 commits behind head on dev.
The diff coverage is 67.70%.

@@             Coverage Diff              @@
##                dev    #4809      +/-   ##
============================================
- Coverage     21.85%   21.82%   -0.04%     
  Complexity     2248     2248              
============================================
  Files           861      861              
  Lines         90167    90205      +38     
  Branches       2284     2284              
============================================
- Hits          19710    19690      -20     
- Misses        69196    69254      +58     
  Partials       1261     1261              

Flag	Coverage Δ
editoast	71.07% <67.70%> (-0.73%)	⬇️

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

Files Changed	Coverage Δ
editoast/editoast_derive/src/infra_model.rs	0.00% <ø> (ø)
editoast/editoast_derive/src/model.rs	0.00% <ø> (ø)
editoast/src/client/postgres_config.rs	100.00% <ø> (ø)
editoast/src/error.rs	25.00% <0.00%> (ø)
editoast/src/models/electrical_profile.rs	100.00% <ø> (ø)
editoast/src/models/pathfinding.rs	100.00% <ø> (ø)
editoast/src/schema/buffer_stop.rs	50.00% <ø> (ø)
editoast/src/schema/catenary.rs	75.00% <ø> (ø)
editoast/src/schema/detector.rs	71.42% <ø> (ø)
editoast/src/schema/neutral_section.rs	50.00% <ø> (ø)
... and 59 more

... and 1 file with indirect coverage changes

[leovalais]

That's a huge amount of work! It's nice to have everything decluttered by those blocks :) Thanks a lot!

I've just read the code for now and left a few cosmetic suggestions.
I wish the async move { ... }.scope_boxed() pattern could be avoided, too bad we can't use async closures. Maybe a macro to hide the boilerplate would work?

In any case, even of the CI says it's good, we'll have to thoroughly test the app to make sure there's no hidden panic or weird behaviors introduced. I'll do that next week (I'm not against some help with that @Tguisnet @flomonster 😛).

[flomonster]

Thanks!
Reviewed and tested. All features seems to work.