Merge pull request 'OZG-3458 extend grpc statistic api' (#172) from...

Merge pull request 'OZG-3458 extend grpc statistic api' (#172) from OZG-3458-extend-grpc-statistic-api into master

Reviewed-on: https://git.ozg-sh.de/mgm/pluto/pulls/172


Reviewed-by: OZGCloud <ozgcloud@mgm-tp.com>