Fix Derive Address Validation

[zupzup]

• The Address derivation endpoint used it's own alpha node id - but we're asking for a specific alpha
• Add logging

[Copilot]

Pull request overview

This PR fixes payment address derivation validation by ensuring the beta mint derives the address using the requested alpha node id (rather than implicitly using its own), and adds error logging to aid debugging in the mint “clowder” flow.

Changes:

• Fetch alpha mint info (get_info) and pass alpha_node_id into DeriveEbillPaymentAddressRequest.
• Add error logs for failures fetching mint info / betas and for address mismatch diagnostics.
• Bump bcr-common git revision to a commit that supports the updated request shape/behavior.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
crates/bcr-ebill-api/src/external/mint.rs	Uses alpha node_id in derive-address request and improves logging around clowder info, betas, and mismatch cases.
Cargo.toml	Updates bcr-common git revision to pick up the corresponding wire/API changes.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 70.58%. Comparing base (691eaf1) to head (f828bdd).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/bcr-ebill-api/src/external/mint.rs	0.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #906   +/-   ##
=======================================
  Coverage   70.58%   70.58%           
=======================================
  Files         139      139           
  Lines       27704    27708    +4     
=======================================
+ Hits        19554    19557    +3     
- Misses       8150     8151    +1     

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