C2S: In automatic Grant upon Deck creation, insert CollabTopicAccept record

Since that table being added, a Collab without a CollabTopicAccept is
considered an open proposal/invitation waiting for completion. So inserting the
CollabTopicAccept is now required for making the Grant valid and active.

src/Vervis/API.hs

@@ -1199,6 +1199,7 @@ createTicketTrackerC (Entity pidUser personUser) senderActor summary audience tr
     insertCollab did obiidGrant = do
         cid <- insert Collab
         insert_ $ CollabTopicLocalDeck cid did
+        insert_ $ CollabTopicAccept cid obiidGrant
         insert_ $ CollabSenderLocal cid obiidGrant
         insert_ $ CollabRecipLocal cid pidUser
         insert_ $ CollabFulfillsLocalTopicCreation cid