feat(client): add client metadata and wallet visibility support

server/crates/arbiter-server/src/grpc/request_tracker.rs

@@ -17,4 +17,10 @@ impl RequestTracker {
 
         Ok(id)
     }
+
+    // This is used to set the response id for auth responses, which need to match the request id of the auth challenge request.
+    // -1 offset is needed because request() increments the next_request_id after returning the current request id.
+    pub fn current_request_id(&self) -> i32 {
+        self.next_request_id - 1
+    }
 }