Task: Session resume

[charlag]

In order to implement encryption in SDK we need to be able to resume login sessions and access user passphrase key.

AC

• SDK has a function to resume session given access token and session encrypted password
• Resuming accesss gives access to the part of the API that supports encryption
• User passphrase key is not retained in memory
• Server and network errors are propagated

Tasks

• Extend public API with resumeSession method
• Load User instance
• Load Session instance
• Load Salt and derive UserPassphraseKey
• Initialize state for encryption (KeyLoaderFacade)
• Depends on Task: EntityClient with well-typed entities in Rust (downloading) #6957
• Depends on Task: Symmetric Encryption primitives in Rust #6953