Notification metrics fixes (#26854)

* Ensure your own posts are never ACKed

* Don't ACK mobile websocket notifications

* Add counter for the unsupported Desktop Apps

* Count only push messages when checking for acks

* Fix generated

* Add tests, fix comment

* Fix help string

* Check for nil session

server/channels/app/web_broadcast_hooks.go

@@ -82,12 +82,11 @@ func usePostedAckHook(message *model.WebSocketEvent, postedUserId string, channe
 }
 
 func (h *postedAckBroadcastHook) Process(msg *platform.HookedWebSocketEvent, webConn *platform.WebConn, args map[string]any) error {
-	// Add if we have mentions or followers
-	// This works since we currently do have an order for broadcast hooks, but this probably should be reworked going forward
-	if msg.Get("followers") != nil || msg.Get("mentions") != nil {
-		msg.Add("should_ack", true)
-		incrementWebsocketCounter(webConn)
-		return nil
+	// Don't ACK mobile app websocket events at this time, we may revisit this when we can add this to mobile app
+	if session := webConn.GetSession(); session != nil {
+		if session.IsMobile() {
+			return nil
+		}
 	}
 
 	postedUserId, err := getTypedArg[string](args, "posted_user_id")
@@ -100,6 +99,14 @@ func (h *postedAckBroadcastHook) Process(msg *platform.HookedWebSocketEvent, web
 		return nil
 	}
 
+	// Add if we have mentions or followers
+	// This works since we currently do have an order for broadcast hooks, but this probably should be reworked going forward
+	if msg.Get("followers") != nil || msg.Get("mentions") != nil {
+		msg.Add("should_ack", true)
+		incrementWebsocketCounter(webConn)
+		return nil
+	}
+
 	channelType, err := getTypedArg[model.ChannelType](args, "channel_type")
 	if err != nil {
 		return errors.Wrap(err, "Invalid channel_type value passed to postedAckBroadcastHook")