DSEGOG-368 fix api dependabot security vulnerability

[moonraker595]

The CI has been failing due to a security vulnerability in one of the dependencies that fast API uses, called Starlette.

Updating the version of fast API to the latest (0.115.5) increased the version of Starlette, patching the security vulnerability.

However, older versions of Starlette were more lenient and implicitly converted raw dictionaries to JSON strings for JSON fields. The newer version enforces stricter adherence to the type hints. This meant that a lot of endpoints were failing the tests as the application could no longer convert the default provided value to a JSON string.

The solution was to simply wrap the default dict in quotes, manually setting default values to a JSON-compatible string.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.67%. Comparing base (8ba1a40) to head (9971b33).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #145   +/-   ##
=======================================
  Coverage   95.67%   95.67%           
=======================================
  Files          73       73           
  Lines        3765     3765           
  Branches      387      387           
=======================================
  Hits         3602     3602           
  Misses        113      113           
  Partials       50       50           

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