Protobuf Key and Header in Kafka Source

[seilerre]

We are currently using a Kafka Source which reads in protobuf like so

      kafka_metrics:
        type: "kafka"
        bootstrap_servers: "bootstrap.strimzi.svc.cluster.local:9093"
        group_id: "metrics.prod"
        topics:
          - "^edge.*metrics.*"
        sasl:
          enabled: true
          mechanism: SCRAM-SHA-512
          username: ${SRC_KAFKA_SASL_USERNAME}
          password: ${SRC_KAFKA_SASL_PASSWORD}
        decoding:
          codec: protobuf
          protobuf:
            desc_file: /opt/proto-store/streamingevent.desc
            message_type: edge.StreamingProtoEventV1Value

We now also want to encode the key and header in protobuf before sending to Kafka. Will Vector be able to read this? How can I include this?