ID-45: Improve session compare csv file

[karlnaden]

Summary

Previously, the expected and actual messages columns of the comparison csv generated by the session compare CLI when the compared session does not match the expected results did not always contain helpful details and often cells were too long. Specifically, extra messages would throw off the comparison and data in a single cell could go over the csv line limit. Now, three enhancements make the output more usable:

• the comparison is more robust and handles extra messages
• by default, multiple duplicate normalized messages in a row are collapsed
• there is an option to include only different messages in the csv file.

Testing Guidance

TODO

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.78%. Comparing base (e6b1948) to head (274bf37).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #780   +/-   ##
=======================================
  Coverage   84.77%   84.78%           
=======================================
  Files         297      297           
  Lines       13968    13969    +1     
  Branches     1955     1955           
=======================================
+ Hits        11842    11843    +1     
  Misses       2118     2118           
  Partials        8        8           

Flag	Coverage Δ
backend	92.45% <ø> (+<0.01%)	⬆️
frontend	79.39% <ø> (ø)

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