docs: update doc

[raphael0202]

• update OpenAPI documentation
• add order_by param to GET /api/v1/insights route

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 54.49%. Comparing base (ef0f861) to head (8e344a8). Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
robotoff/app/api.py	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1451 +/- ## ========================================== - Coverage 54.62% 54.49% -0.14% ========================================== Files 85 85 Lines 8620 8660 +40 ========================================== + Hits 4709 4719 +10 - Misses 3911 3941 +30 ```

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