feat: implement signer.Alg()

[baha-ai]

Signed-off-by: Baha Shaaban baha.shaaban@securekey.com

[codecov]

Codecov Report

Merging #3332 (5370fd7) into main (03f747c) will increase coverage by 0.00%.
The diff coverage is 92.85%.

@@           Coverage Diff           @@
##             main    #3332   +/-   ##
=======================================
  Coverage   88.01%   88.01%           
=======================================
  Files         323      323           
  Lines       44401    44437   +36     
=======================================
+ Hits        39078    39110   +32     
- Misses       3927     3929    +2     
- Partials     1396     1398    +2     

Impacted Files	Coverage Δ
pkg/controller/command/verifiable/command.go	89.35% <78.57%> (-0.23%)	⬇️
...oc/util/signature/internal/signer/crypto_signer.go	98.76% <100.00%> (+2.99%)	⬆️
pkg/wallet/kmsclient.go	95.16% <100.00%> (-1.36%)	⬇️

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