feat: include signer bitvec in nakamoto block event

[hstove]

This includes the signer_bitvec in the /mined_nakamoto_block event.

• Closes [Nakamoto] Emit signer performance data #4257

This property is formatted as a hex string, using the consensus_serialize implementation of BitVec. The first bytes are the length of the bitvec, encoded as a u16. Then the rest of the string is the bitvec data.

[zone117x]

TIL about the /mined_nakamoto_block. This one isn't consumed anywhere AFAIK (and first time I've seen it). Could you please add this to the /new_block event?

[codecov]

Codecov Report

Attention: Patch coverage is 68.18182% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 72.60%. Comparing base (ae8a483) to head (a5e6550).
Report is 49 commits behind head on next.

Additional details and impacted files

@@             Coverage Diff             @@
##             next    #4526       +/-   ##
===========================================
- Coverage   83.30%   72.60%   -10.70%     
===========================================
  Files         452      453        +1     
  Lines      326058   327384     +1326     
  Branches      323      323               
===========================================
- Hits       271614   237707    -33907     
- Misses      54436    89669    +35233     
  Partials        8        8               

Files	Coverage Δ
stackslib/src/chainstate/coordinator/mod.rs	61.53% <ø> (+0.21%)	⬆️
stackslib/src/chainstate/nakamoto/mod.rs	83.27% <100.00%> (-0.14%)	⬇️
stackslib/src/net/mod.rs	69.43% <100.00%> (-3.84%)	⬇️
testnet/stacks-node/src/run_loop/mod.rs	99.18% <100.00%> (+<0.01%)	⬆️
...net/stacks-node/src/tests/nakamoto_integrations.rs	95.26% <100.00%> (+0.30%)	⬆️
stackslib/src/chainstate/coordinator/tests.rs	76.33% <0.00%> (-14.46%)	⬇️
stackslib/src/chainstate/stacks/db/blocks.rs	79.88% <0.00%> (-10.16%)	⬇️
testnet/stacks-node/src/event_dispatcher.rs	78.03% <62.06%> (-7.37%)	⬇️

... and 215 files with indirect coverage changes

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[obycode]

lgtm!

[hstove]

@zone117x I've added the bitvec string to /new_block, mind taking another look?