feat: add "receivedInitialSync" connection update

src/Types/Auth.ts

@@ -48,6 +48,8 @@ export type AuthenticationCreds = SignalCreds & {
     platform?: string
 
     processedHistoryMessages: MinimalMessage[]
+    /** number of times history & app state has been synced */
+    accountSyncCounter: number
     accountSettings: AccountSettings
 }