chore: sync local updates

mengyamonitor-backend-server/proto/mengya/v1/agent.proto

@@ -0,0 +1,41 @@
+syntax = "proto3";
+
+package mengya.v1;
+
+option go_package = "mengyamonitor-backend-server/internal/gen/mengyav1;mengyav1";
+
+// AgentIngest: 采集端出站连接，双向流上报指标。
+service AgentIngest {
+  rpc Connect(stream AgentMessage) returns (stream ControlMessage);
+}
+
+message AgentMessage {
+  oneof payload {
+    Hello hello = 1;
+    Heartbeat heartbeat = 2;
+    MetricsReport metrics = 3;
+  }
+}
+
+message Hello {
+  string server_id = 1;
+  string agent_key = 2;
+  string hostname = 3;
+}
+
+message Heartbeat {}
+
+message MetricsReport {
+  string payload_json = 1;
+  int64 collected_at_unix_ms = 2;
+}
+
+message ControlMessage {
+  oneof payload {
+    Ack ack = 1;
+  }
+}
+
+message Ack {
+  string message = 1;
+}