feat: add missing fields to authStore schemas/protos

[tomasciccola]

This PR adds missing fields to authStore Schemas and protobufs.
Things that can be revised:

• some fields name *Id that are typed as string on the protobuf could be of type bytes.
• capabilityType is a string but can be an enum. Looking at this code I don't know this should be the name of the role (projectCreator | coordinator | member | non-member) or the capabilities (read | write | manage:devices).

This should close PR #44

[gmaclennan]

Looks good to me. Ok to leave possible enums as strings for now, and we can review later.