♻️ Refactor profile and session handling

- makes the profile access more efficient (replace in-app joins to a
  simple select query on profile table
- add partial support for access-tokens (still missing some RPC methods)
- move router definitions to specific modules and simplify the main http
  module definitions to simple includes
- simplifiy authentication code related to access-tokens and sessions
- normalize db parameters with proper namespaced props
- more work on convert all modules initialization to use proper specs
  with fully-qualified keyword config props

backend/src/app/rpc/doc.clj

@@ -70,6 +70,8 @@
       (respond (yrs/response 404)))))
 
 
+(s/def ::routes vector?)
+
 (defmethod ig/pre-init-spec ::routes [_]
   (s/keys :req-un [::rpc/methods]))