Save media in a "site" bucket

[RonanMorgan]

This is a first step to start this refactor : gathering images per site / installation.

[codecov]

Codecov Report

Attention: Patch coverage is 69.44444% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 94.43%. Comparing base (767be30) to head (8dd60c1).

Files	Patch %	Lines
src/app/api/endpoints/media.py	63.63%	4 Missing ⚠️
src/app/services/storage.py	60.00%	4 Missing ⚠️
src/app/api/deps.py	83.33%	2 Missing ⚠️
src/app/services/services.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #323      +/-   ##
==========================================
- Coverage   94.54%   94.43%   -0.11%     
==========================================
  Files          63       63              
  Lines        1594     1600       +6     
==========================================
+ Hits         1507     1511       +4     
- Misses         87       89       +2     

Flag	Coverage Δ
unittests	94.43% <69.44%> (-0.11%)	⬇️

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[frgfm]

Thanks for the PR :)
The description mostly comes from the illustration, so am I understanding this clearly: we create one bucket per entity (organization now I guess?)

[RonanMorgan]

well the schema is a bit outdated : I did some calculation with OVH Cold Archive vs OVH S3 and for now it would cose only few euros to keep years of data

but yes I would like to have one bucket per organization :)