Fix keyset call

[zupzup]

• Use mint client for get_keyset_info to have the right URL
• Update bcr-common

[Copilot]

Pull request overview

This PR fixes mint keyset retrieval by routing get_keyset_info through the bcr-common mint client (to ensure the correct endpoint/base URL is used) and updates the bcr-common dependency revision accordingly.

Changes:

• Refactor MintClient::get_keyset_info to parse the keyset id and call the mint client’s keyset endpoint instead of constructing a manual URL + raw reqwest call.
• Bump bcr-common git revision to a newer commit.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
crates/bcr-ebill-api/src/external/mint.rs	Updates keyset lookup implementation to use the mint client API and parses keyset IDs into the correct type.
Cargo.toml	Updates the bcr-common git rev to the version that supports/fixes the intended mint client behavior.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.52%. Comparing base (0cc19e8) to head (4fe9553).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/bcr-ebill-api/src/external/mint.rs	0.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #903      +/-   ##
==========================================
+ Coverage   70.49%   70.52%   +0.03%     
==========================================
  Files         139      139              
  Lines       27689    27685       -4     
==========================================
+ Hits        19519    19526       +7     
+ Misses       8170     8159      -11     

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