Fix fetch unlabeled detections endpoint

[RonanMorgan]

When calling the fetch unlabeled detections endpoint with an ADMIN token, the pictures were not found in the S3 because the organisation_id of ADMIN is = 1, while we would like to get all the Detection of all the organization.

So for ADMIN token we should find the organization_id thanks to the Camera.detection_id

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 70.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 84.83%. Comparing base (f737b0d) to head (982c194). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/app/api/api_v1/endpoints/detections.py	80.00%	3 Missing :warning:
src/app/crud/base.py	50.00%	2 Missing :warning:
src/app/api/dependencies.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #366      +/-   ##
==========================================
- Coverage   85.51%   84.83%   -0.68%     
==========================================
  Files          35       35              
  Lines         987      996       +9     
==========================================
+ Hits          844      845       +1     
- Misses        143      151       +8     

Flag	Coverage Δ
backend	84.35% <70.00%> (-0.72%)	:arrow_down:
client	92.06% <ø> (ø)

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