[Wallet] no async for deserialization functions

[callebtc]

No description provided.

[codecov]

Codecov Report

Patch coverage: 90.00% and no project coverage change.

Comparison is base (c61971b) 56.03% compared to head (80d1830) 56.03%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #255   +/-   ##
=======================================
  Coverage   56.03%   56.03%           
=======================================
  Files          42       42           
  Lines        3346     3346           
=======================================
  Hits         1875     1875           
  Misses       1471     1471           

Impacted Files	Coverage Δ
cashu/wallet/cli/cli.py	49.85% <50.00%> (ø)
cashu/wallet/api/router.py	77.83% <100.00%> (ø)
cashu/wallet/helpers.py	84.76% <100.00%> (ø)

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