Enrich OxiCloud to maximise the use of `dedup` Engine
2 cases will be covered:
- blobs issues from other blobs (thumbnail automatic generation from blob)
- by filename (ex: thumbnail uploaded from users)
A local cache will be added when blobs are remote (S3 or similar)
Prevent services accessing directly to localstorage and prefer using an astraction layer
to expose full blob. The abstraction layer (dedup services) will cover backend storage
election (local, s3, ...), encryption, etc
This change permit audio_metadata_service, media_metadaa_service, face_indexing_service to handle
blobs without worring of the backend.
note: prefered way to handle blob is the streamed way. Some services may not have this possibility
Edouard Vanbelle