[MM-56757] Expand NotificationsLog to include websocket and email, adding much more varied logging across the entire process (#26273)

* [MM-56757] Expand NotificationsLog to include websocket and email, adding much more varied logging across the entire process

* Rework the status/notify prop calls

* Avoid some repetition in the logging calls

* Fix one log

* Wrap error

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/public/model/notification.go

@@ -0,0 +1,22 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+const (
+	StatusBlocked     = "blocked"
+	StatusServerError = "server_error"
+	StatusNotSent     = "not_sent"
+
+	TypeEmail     = "email"
+	TypeWebsocket = "websocket"
+	TypePush      = "push"
+
+	ReasonServerConfig   = "server_config"
+	ReasonUserConfig     = "user_config"
+	ReasonUserStatus     = "user_status"
+	ReasonFetchError     = "error_fetching"
+	ReasonServerError    = "server_error"
+	ReasonMissingProfile = "missing_profile"
+	ReasonPushProxyError = "push_proxy_error"
+)