Add ApplicationInstanceRecover message for the request of instance recover service

apm-network/src/main/proto/DiscoveryService.proto

@@ -14,7 +14,7 @@ service InstanceDiscoveryService {
     rpc heartbeat (ApplicationInstanceHeartbeat) returns (Downstream) {
     }
 
-    rpc registerRecover (ApplicationInstanceMapping) returns (Downstream) {
+    rpc registerRecover (ApplicationInstanceRecover) returns (Downstream) {
     }
 }
 
@@ -26,6 +26,11 @@ message ApplicationInstance {
 message ApplicationInstanceMapping {
     int32 applicationId = 1;
     int32 applicationInstanceId = 2;
+}
+
+message ApplicationInstanceRecover {
+    int32 applicationId = 1;
+    int32 applicationInstanceId = 2;
     int64 registerTime = 3;
 }
 
@@ -56,5 +61,4 @@ message ServiceNameMappingElement {
 message ServiceNameElement {
     string serviceName = 1;
     int32 applicationId = 2;
-}
-
+}
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