fix: 服务创建接口未返回数据

AddPlayerServicesResp 加 PlayerServices 字段，创建后查询回填。
PlayerService.Id 加 optional 避免请求解析时要求传 id。

app/player/rpc/pb/player_grpc.pb.go

@@ -1,8 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
 // - protoc-gen-go-grpc v1.6.1
-// - protoc             v5.29.6
-// source: player.proto
+// - protoc             v7.34.1
+// source: desc/rpc/player.proto
 
 package pb
 
@@ -501,5 +501,5 @@ var PlayerService_ServiceDesc = grpc.ServiceDesc{
 		},
 	},
 	Streams:  []grpc.StreamDesc{},
-	Metadata: "player.proto",
+	Metadata: "desc/rpc/player.proto",
 }