chore: update dependencies

[callebtc]

Summary

• update advisory-related Python dependencies to current compatible releases
• adapt wallet HTTPX proxy setup and template rendering for newer APIs
• harden live mint test fixture around readiness, SQLite reset, and Redis cache isolation

Verification

• pytest tests -q -x --tb=short
• make check
• standalone mint smoke against /v1/info

[codecov]

Codecov Report

❌ Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 75.82%. Comparing base (84d396e) to head (6260c0f).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
cashu/wallet/auth/openid_connect/openid_client.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1076      +/-   ##
==========================================
+ Coverage   75.52%   75.82%   +0.29%     
==========================================
  Files         111      111              
  Lines       12574    12461     -113     
==========================================
- Hits         9497     9449      -48     
+ Misses       3077     3012      -65     

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