ntf server: better batching and logging (#780)

* ntf server: better batching and logging

* reduce batch delay for ntf server

* comments

* 5.1.3, ntf 1.4.2

* more logging

* more logging

* split large batches, more logging

* remove some logs

tests/SMPClient.hs

@@ -159,7 +159,7 @@ smpServerTest _ t = runSmpTest $ \h -> tPut' h t >> tGet' h
   where
     tPut' h (sig, corrId, queueId, smp) = do
       let t' = smpEncode (sessionId (h :: THandle c), corrId, queueId, smp)
-      [Right ()] <- tPut h [(sig, t')]
+      [Right ()] <- tPut h Nothing [(sig, t')]
       pure ()
     tGet' h = do
       [(Nothing, _, (CorrId corrId, qId, Right cmd))] <- tGet h