Provide possibility for stateless storage

[valiafetisov]

Describe the feature

Currently we store sessions on the server, but the is a known pattern to encrypt the data and store it on the client, removing a requirement for state preservation whatsoever. Possible implementation of this approach is vvo/iron-session (originally referenced in #15.

Known problems with this approach:

• Storage size (cookie is limited to 4096 bytes)
• Migrations/remote clearing of session

We should evaluate this approach and propose technical solution.
From my perspective it's a good candidate for the driver option (e.g. driver: 'stateless')

Additional information

No response