Revert "remove @GrpcClient annotation"

This reverts commit 798a1113.

api-lib-core/src/main/java/de/ozgcloud/apilib/file/grpc/GrpcOzgCloudFileService.java

@@ -36,14 +36,15 @@ import io.grpc.stub.CallStreamObserver;
 import io.grpc.stub.StreamObserver;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.java.Log;
+import net.devh.boot.grpc.client.inject.GrpcClient;
 
 @RequiredArgsConstructor
 @Log
 public class GrpcOzgCloudFileService implements OzgCloudFileService {
 
-//	@GrpcClient("file-manager")
+	@GrpcClient("file-manager")
 	private final BinaryFileServiceBlockingStub blockingStub;
-//	@GrpcClient("file-manager")
+	@GrpcClient("file-manager")
 	private final BinaryFileServiceStub asyncServiceStub;
 
 	private final OzgCloudCallContextProvider contextProvider;