Fix session delete endpoint

[d-j-hatton]

Set up relationship between Session and SessionProcessingParameters tables for cascade delete

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.99%. Comparing base (0a29d98) to head (7f02c01).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #544      +/-   ##
==========================================
+ Coverage   28.97%   28.99%   +0.01%     
==========================================
  Files          80       80              
  Lines       10322    10324       +2     
  Branches     1363     1363              
==========================================
+ Hits         2991     2993       +2     
  Misses       7230     7230              
  Partials      101      101              

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