#616: Fixed pending payment check on startup

[cjbeery24]

Removed blocking call from ledger startup. Instead added it to a background task that repeats every hour.

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 6 lines in your changes missing coverage. Please review.

Project coverage is 64.57%. Comparing base (23a706d) to head (d1c304f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cashu/mint/ledger.py	53.84%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #707      +/-   ##
==========================================
- Coverage   65.67%   64.57%   -1.11%     
==========================================
  Files          88       88              
  Lines        9513     9533      +20     
==========================================
- Hits         6248     6156      -92     
- Misses       3265     3377     +112     

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[lollerfirst]

"hourly" seems pretty arbitrary. would you consider parametrize this and add in the setting?

[lollerfirst]

also seems like test_startup_fakewallet_pending_quote_failure needs to be adjusted.