Add sqlite connector support

[d-j-hatton]

Configurable choice to setup the sqlalchemy engine with SQLite rather than PostgreSQL. This is set in the security configuration. The database name in the database credentials file should be the path to the SQLite database.

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.59%. Comparing base (e5448b9) to head (f919b3b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #733      +/-   ##
==========================================
- Coverage   46.59%   46.59%   -0.01%     
==========================================
  Files          91       91              
  Lines        9631     9634       +3     
  Branches     1261     1262       +1     
==========================================
+ Hits         4488     4489       +1     
- Misses       4930     4932       +2     
  Partials      213      213              

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