Properly pass alignment info/score to Serval

[Enkidu93]

Include NULL alignments.

Is there more we need to do in machine.py to fix this? We are already passing the translation scores (unless there's something weird happening under the hood in thot).

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This change is 

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.10%. Comparing base (b152005) to head (8bdb2fa).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #365   +/-   ##
=======================================
  Coverage   92.10%   92.10%           
=======================================
  Files         389      389           
  Lines       24559    24559           
=======================================
  Hits        22620    22620           
  Misses       1939     1939           

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[ddaspit]

@ddaspit reviewed 1 file and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on Enkidu93).

[Enkidu93]

@ddaspit - just making sure: Did you see my comment? Is this the only machine.py change we need or is there a change to thot or something we need to incorporate?