feat: Use installation ID in remote enrollments (#21662)

* Pass installation ID for storage on enrollments server for
deduping/grouping multiple appservers per installation
* Pass installation ID in remoteControl/status/changed events

codex-rs/app-server-protocol/schema/json/v2/RemoteControlStatusChangedNotification.json

@@ -11,7 +11,7 @@
       "type": "string"
     }
   },
-  "description": "Current remote-control connection status and environment id exposed to clients.",
+  "description": "Current remote-control connection status and remote identity exposed to clients.",
   "properties": {
     "environmentId": {
       "type": [
@@ -19,11 +19,15 @@
         "null"
       ]
     },
+    "installationId": {
+      "type": "string"
+    },
     "status": {
       "$ref": "#/definitions/RemoteControlConnectionStatus"
     }
   },
   "required": [
+    "installationId",
     "status"
   ],
   "title": "RemoteControlStatusChangedNotification",