Treat an absent media-list return code as the protobuf zero default while preserving failures for explicit non-zero codes. Add a regression test that exercises the encoded response path with media data and no status field. Refs #234
Treat an absent media-list return code as the protobuf zero default while preserving failures for explicit non-zero codes. Add a regression test that exercises the encoded response path with media data and no status field. Refs #234