UBERF-8899: Fix Reconnect performance (#7597)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

server/rpc/src/rpc.ts

@@ -46,6 +46,8 @@ export interface HelloResponse extends Response<any> {
   binary: boolean
   reconnect?: boolean
   serverVersion: string
+  lastTx?: string
+  lastHash?: string // Last model hash
 }
 
 function replacer (key: string, value: any): any {