[MM-57010] Include client type in websocket connections metric (#26763)

* Include client type in websocket connections metric

* Unexport field

server/channels/app/platform/web_conn.go

@@ -67,6 +67,7 @@ type WebConnConfig struct {
 	ConnectionID string
 	Active       bool
 	ReuseCount   int
+	OriginClient string
 
 	// These aren't necessary to be exported to api layer.
 	sequence         int
@@ -115,6 +116,9 @@ type WebConn struct {
 	session      atomic.Pointer[model.Session]
 	connectionID atomic.Value
 
+	// The client type behind the connection (i.e. web, desktop or mobile)
+	originClient string
+
 	activeChannelID                 atomic.Value
 	activeTeamID                    atomic.Value
 	activeRHSThreadChannelID        atomic.Value
@@ -236,6 +240,7 @@ func (ps *PlatformService) NewWebConn(cfg *WebConnConfig, suite SuiteIFace, runn
 		pluginPosted:       make(chan pluginWSPostedHook, 10),
 		lastLogTimeSlow:    time.Now(),
 		lastLogTimeFull:    time.Now(),
+		originClient:       cfg.OriginClient,
 	}
 	wc.active.Store(cfg.Active)
 
@@ -954,11 +959,13 @@ func (wc *WebConn) logSocketErr(source string, err error) {
 	if websocket.IsCloseError(err, websocket.CloseNormalClosure, websocket.CloseNoStatusReceived) {
 		mlog.Debug(source+": client side closed socket",
 			mlog.String("user_id", wc.UserId),
-			mlog.String("conn_id", wc.GetConnectionID()))
+			mlog.String("conn_id", wc.GetConnectionID()),
+			mlog.String("origin_client", wc.originClient))
 	} else {
 		mlog.Debug(source+": closing websocket",
 			mlog.String("user_id", wc.UserId),
 			mlog.String("conn_id", wc.GetConnectionID()),
+			mlog.String("origin_client", wc.originClient),
 			mlog.Err(err))
 	}
 }