Hello Team if realtime table design for proto serializer as stream.kafka.decoder.class.name": "org.apache.pinot.plugin.inputformat.protobuf.ProtoBufMessageDecoder", and it has minion configuration

"taskTypeConfigsMap": {
            "RealtimeToOfflineSegmentsTask": {
              "schedule": "*/15 * * ** ?",
              "bucketTimePeriod": "6h",
              "bufferTimePeriod": "1d"
            }
          }

when we create off line table on same schema then what will file format it will store what file format? in offline table we have config

"ingestionConfig": {
          "continueOnError": false,
          "rowTimeValueCheck": false,
          "batchIngestionConfig": {
            "consistentDataPush": false,
            "segmentIngestionType": "APPEND",
            "segmentIngestionFrequency": "HOURLY"
          },

is there anything we have to specify for file format in offline table when there is an hybrid table.How I ensure that offline table also use same file compression as real time. in summary Hybrid table definition if Realtime --> proto buffet --> what will offline table segment format type.is it csv /json/proto. How I can confirm Hybrid table definition if real time Avro ===>> what will offline table segment type