feat(proposer): add a new metric to track block fee

[davidtaikocha]

No description provided.

[codecov]

Codecov Report

Merging #224 (0ed5244) into main (49a25dd) will decrease coverage by 0.72%.
The diff coverage is 58.62%.

@@            Coverage Diff             @@
##             main     #224      +/-   ##
==========================================
- Coverage   53.17%   52.45%   -0.72%     
==========================================
  Files          36       36              
  Lines        3415     3416       +1     
==========================================
- Hits         1816     1792      -24     
- Misses       1366     1388      +22     
- Partials      233      236       +3     

Impacted Files	Coverage Δ
prover/proof_producer/special_proof_producer.go	7.40% <0.00%> (-0.29%)	⬇️
proposer/proposer.go	63.15% <57.14%> (-0.21%)	⬇️
driver/driver.go	59.70% <100.00%> (-0.89%)	⬇️
pkg/rpc/utils.go	53.73% <100.00%> (+3.73%)	⬆️
prover/proof_submitter/valid_proof_submitter.go	62.63% <100.00%> (-1.20%)	⬇️
prover/prover.go	50.00% <100.00%> (-4.65%)	⬇️

... and 1 file with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more