DSEGOG-307 Kill API Instances Cleanly in Echo Ingest Script

[MRichards99]

This is a small change to improve the Echo ingestion script. It used to not kill the API at the end of the script so the processes needed to be manually killed - the problem would often occur when you launch the API using poetry run and it would complain the address is already in use.

To make this better, the kill function now uses lsof to pinpoint all processes attached to the port used for the API, puts those PIDs into a list and uses the standard library os.kill() to kill them one by one.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.33%. Comparing base (58c286f) to head (ce12fd8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #113   +/-   ##
=======================================
  Coverage   91.33%   91.33%           
=======================================
  Files          47       47           
  Lines        2446     2446           
  Branches      197      197           
=======================================
  Hits         2234     2234           
  Misses        186      186           
  Partials       26       26           

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[MRichards99]

Just merged main in so the CI passes (safety job was failing)