Optimized Blob Storage in Dexie Cloud

[dfahlander]

Dexie cloud already supports Blobs, ArrayBuffers and other exotic types, but it does it by encapsulating them into a JSON format for both transport and storage.

To optimize for large blobs we will store blobs and possibly non-indexed large strings or arraybuffers in azure blob storage instead of postgres rows.

This will allow for cheaper and more performant storing and syncing of images, music and videos.

When this is implemented, the user does not need to change anything except upgrading dexie-cloud-addon to take advantage of it.

[dfahlander]

Oops there was already a dup of this #1860. It has some more details...