ios: deliver notifications instantly when server has no more messages and better concurrency (#5872)

* core: return error and message absence when getting notifications

* ios: do not wait for notification messages when server says "no"

* do not postpone some notification events, comments

* refactor

* simplexmq (mapM)

* simplexmq (release lock)

* ios: inline, more aggressive GHC RTC settings for garbage collection

* simplexmq

* corrections

Co-authored-by: spaced4ndy <8711996+spaced4ndy@users.noreply.github.com>

* refactor ntf delivery

* ios: 6.3.4 (build 274)

* simplexmq (fix updating last ts)

* improve notification for multiple messages

* simplexmq

---------

Co-authored-by: spaced4ndy <8711996+spaced4ndy@users.noreply.github.com>

src/Simplex/Chat/Library/Commands.hs

@@ -1304,7 +1304,7 @@ processChatCommand' vr = \case
           $>>= \user -> fmap (mkNtfConn user) . eitherToMaybe <$> runExceptT (getConnectionEntity db vr user agentConnId)
   APIGetConnNtfMessages connMsgs -> withUser $ \_ -> do
     msgs <- lift $ withAgent' (`getConnectionMessages` connMsgs)
-    let ntfMsgs = L.map (receivedMsgInfo <$>) msgs
+    let ntfMsgs = L.map receivedMsgInfo msgs
     pure $ CRConnNtfMessages ntfMsgs
   GetUserProtoServers (AProtocolType p) -> withUser $ \user -> withServerProtocol p $ do
     srvs <- withFastStore (`getUserServers` user)