Add /lookup/doc endpoint

[tahpot]

Fetching a stored public document on the Verida network can be time consuming as they make a blockchain request. They also require the Verida SDK.

Create an endpoint on the storage node (/lookup/doc/${docUri}) that fetches the public document and returns it. This will be cached.

Example docUri: verida://${did}/${contextHash}/${databaseName}/$documentId

Example requests:

• /lookup/doc?uri=urlEncode('verida://${did}/${contextHash}/${databaseName}/$documentId')
• /lookup/doc?uri=urlEncode('verida://${did}/${contextHash}/${databaseName}/$documentId'?ignoreCache=true)

[tahpot]

Perhaps extend this to support fetching multiple documents.

Then you could easily fetch a full public profile at once.

Ideally it's possible to return an actual image for an avatarUri