Send auction transcript to relay monitor

[avalonche]

📝 Summary

Sends the signed builder bid and signed blinded beacon block to the relay monitor to verify the integrity of the auction. See https://hackmd.io/@ralexstokes/SynPJN_pq for the types of faults detected.

⛱ Motivation and Context

📚 References

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✅ I have run these commands

• [x] make lint
• [x] make test-race
• [x] go mod tidy

[codecov-commenter]

Codecov Report

Merging #297 (0bf9acc) into main (46c074f) will decrease coverage by 0.14%. The diff coverage is 28.57%.

@@            Coverage Diff             @@
##             main     #297      +/-   ##
==========================================
- Coverage   66.66%   66.51%   -0.15%     
==========================================
  Files           7        7              
  Lines         888      902      +14     
==========================================
+ Hits          592      600       +8     
- Misses        262      267       +5     
- Partials       34       35       +1     

Flag	Coverage Δ
unittests	66.51% <28.57%> (-0.15%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/service.go	78.57% <28.57%> (-0.72%)	:arrow_down:

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