Move the firstRooms signpost out of the RoomSummaryProvider so that it doesn't invoked for each instance

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -399,6 +399,8 @@ class ClientProxy: ClientProxyProtocol {
                                     appIdentifier: "MainApp")
                 .finish()
             let roomListService = syncService.roomListService()
+            
+            ServiceLocator.shared.analytics.signpost.beginFirstRooms()
 
             let eventStringBuilder = RoomEventStringBuilder(stateEventStringBuilder: RoomStateEventStringBuilder(userID: userID))
             roomSummaryProvider = RoomSummaryProvider(roomListService: roomListService,

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProvider.swift

@@ -66,8 +66,6 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
         self.appSettings = appSettings
         self.backgroundTaskService = backgroundTaskService
         
-        ServiceLocator.shared.analytics.signpost.beginFirstRooms()
-        
         diffsPublisher
             .receive(on: serialDispatchQueue)
             .sink { [weak self] in self?.updateRoomsWithDiffs($0) }