Added Sample Doc Action Task and Cleanup Task Execution

[JSv4]

Added sample contract classifier using gpt4 plus some cleanup in how we kickoff and handle analyses.

[codecov]

Codecov Report

Attention: Patch coverage is 85.50725% with 10 lines in your changes missing coverage. Please review.

Project coverage is 78.40%. Comparing base (dc36b9b) to head (9bf3f3f).
Report is 10 commits behind head on main.

Files	Patch %	Lines
opencontractserver/tasks/analyzer_tasks.py	50.00%	3 Missing ⚠️
opencontractserver/tasks/doc_analysis_tasks.py	66.66%	3 Missing ⚠️
opencontractserver/tasks/corpus_tasks.py	90.47%	2 Missing ⚠️
opencontractserver/utils/celery_tasks.py	86.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #198      +/-   ##
==========================================
- Coverage   78.43%   78.40%   -0.04%     
==========================================
  Files          61       63       +2     
  Lines        2917     2963      +46     
==========================================
+ Hits         2288     2323      +35     
- Misses        629      640      +11     

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