Expand information available about Users in the keycloak_user table

[graza-io]

Currently we have a minimal usage subset in this keycloak_user table, this is omitting valuable data such as:

• Federation Link : string
• Attributes : map[string][]string
• RealmRoles : []string
• Groups : []string (linkable via keycloak_user_group currently)
• ClientRoles : map[string][]string
• RequiredActions : []string