feat(metrics): introduce ProverProvenByGuardianGauge

[davidtaikocha]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 40.90909% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 47.88%. Comparing base (54791c0) to head (1114cc3).
Report is 34 commits behind head on main.

Files	Patch %	Lines
pkg/rpc/methods.go	0.00%	5 Missing ⚠️
prover/init.go	66.66%	2 Missing and 1 partial ⚠️
prover/prover.go	0.00%	2 Missing and 1 partial ⚠️
prover/event_handler/block_verified.go	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #794      +/-   ##
==========================================
- Coverage   48.62%   47.88%   -0.75%     
==========================================
  Files          57       57              
  Lines        5678     5747      +69     
==========================================
- Hits         2761     2752       -9     
- Misses       2623     2696      +73     
- Partials      294      299       +5     

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