docs: update doc

[raphael0202]

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

[codecov]

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 ⚠️

Additional details and impacted files

@@            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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