* clean up error handling in postDashboard and remove UserDisplayDTO
* replace GetUserUID with GetUID and GetNamespacedUID, enforce namespace constant type
* lint fix
* lint fix
* more lint fixes
* Authn: Resolve authenticate by and auth id when fethcing signed in user
* Change logout client interface to only take Requester interface
* Session: Fetch external auth info when authenticating sessions
* Use authenticated by from identity
* Move call to get auth-info into session client and use GetAuthenticatedBy in various places
* Add email and email_verified to id token if identity is a user
* Add endpoint to trigger email verification for user
* Add function to clear stored id tokens and use it when email verification is completed
* IDForwarding: change audience to be prefixed by org and remove JTI
* IDForwarding: Construct new signer each time we want to sign a token.
* SigningKeys: Simplify storage layer and move logic to service
* SigningKeys: Add private key to local cache
* AuthN: Move identity struct to its own file
* IDForwarding: Add IDToken property to usr and identity structs and add GetIDToken to requester interface
* Inject IDService into background services
* IDForwarding: Register post auth hook when feature toggle is enabled