Chore/public keys

[asimm241]

• Add support for public keys in preprocess and metadata endpoint to accommodate these:
  Provide PubKeys to /construction/metadata coinbase/mesh-specifications#46, Access PublicKeys During Construction coinbase/mesh-specifications#45

[codecov]

Codecov Report

Merging #288 into master will increase coverage by 0.02%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##           master     #288      +/-   ##
==========================================
+ Coverage   65.14%   65.16%   +0.02%     
==========================================
  Files          53       53              
  Lines        3787     3801      +14     
  Branches      674      649      -25     
==========================================
+ Hits         2467     2477      +10     
- Misses       1317     1321       +4     
  Partials        3        3              

Impacted Files	Coverage Δ
src/api/routes/rosetta/construction.ts	76.92% <71.42%> (-0.50%)	⬇️

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[blockstack-devops]

🎉 This PR is included in version 0.25.5 🎉

The release is available on:

• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• GitHub release

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