feat(cli): Add --log-vertex-bytes for debugging

[msbrogli]

Motivation

We faced some difficulties replicating issue reports from developers. So this PR introduces a parameter to make replication easier just by sharing the full node log with us.

Acceptance Criteria

• Add the --log-vertex-bytes parameter in the run_node cli.
• Add the VertexHandler._log_vertex_bytes: bool which defaults to false.
• Log the transaction bytes when this new option is enabled.

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 84.89%. Comparing base (75605be) to head (9b1c03e).

Files	Patch %	Lines
hathor/vertex_handler/vertex_handler.py	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1033      +/-   ##
==========================================
- Coverage   84.89%   84.89%   -0.01%     
==========================================
  Files         297      297              
  Lines       22910    22913       +3     
  Branches     3464     3465       +1     
==========================================
+ Hits        19449    19451       +2     
+ Misses       2775     2773       -2     
- Partials      686      689       +3     

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[jansegre]

Looks good to me, but I think it's fine for it to be a regular argument instead (no -x).