S2S: Factory: Implement collaborators and teams

Teams now serve as a way to offer factories to remote instances

src/Vervis/Actor/Common.hs

@@ -2175,6 +2175,12 @@ componentRemove grabKomponent topicComponent now topicKey (Verse authorIdMsig bo
             Just inboxItemID ->
                 doneDB inboxItemID "[Team-passive] Saw the removal attempt, just waiting for the Revoke"
 
+-- Meaning: An actor A asked to join a resource
+-- Behavior:
+--      * Verify the resource is me
+--      * Verify A doesn't already have an invite/join/grant for me
+--      * Remember the join in DB
+--      * Forward the Join to my followers
 topicJoin
     :: (PersistRecordBackend topic SqlBackend, ToBackendKey SqlBackend topic)
     => (topic -> ResourceId)