implement project reset cleanup

[hahn-kev]

closes #663

this works by parsing the folder names in the deleted folder and pulling out the timestamp. If it can't get a time stamp it does nothing, if it can then it will make sure the project was reset greater than the cleanup threshold (default 31 days).

Right now this only cleans up reset project backups. Should we also include normal deleted projects and do they need a different threshold?

[github-actions]

C# Unit Tests

71 tests  +5   71 ✅ +5   5s ⏱️ -1s
12 suites +1    0 💤 ±0 
 1 files   ±0    0 ❌ ±0 

Results for commit 883bad0. ± Comparison against base commit a84e265.

♻️ This comment has been updated with latest results.

[myieye]

My manual test using the testing endpoint was successful. I ran a dry run and then a wet run:

[myieye]

As a reminder:
As discussed at our meeting today, @hahn-kev wants to test our backups and then extend this logic to also delete deleted projects that are 31 days old.