add support for protobuf encoding

[darshanime-d11]

this PR adds support to encode message in protobuf encoding, for use with the kafka sink.

the samples/pluto.dg file has been updated to use the protobuf serialiser.

{
    "clear_data": true,
    "models": [
        {
            "model_name": "pluto",
            "target_sinks": [
                "pluto_kafka"
            ],
            "count": 100
        }
    ],
    "sinks": [
        {
            "sink_name": "pluto_kafka",
            "sink_type": "kafka",
            "config": {
                "topic": "pluto-events",
                "key": "age",
                "include_key_in_message": "true",
                "bootstrap_servers": [
                    "localhost:9092"
                ],
                "throttle": "1ms",
                "batch_size": 100
            }
        }
    ]
}

$ datagen execute ./samples -c ./samples/config.json

[orca-security-in]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   4   12   7	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

🛡️ The following IaC misconfigurations have been detected

	NAME	FILE
	Controller creating containers without dropped capabilities	docker-compose.yml	View in code
	Controller creating containers without dropped capabilities	docker-compose.yml	View in code
	Controller creating containers without dropped capabilities	docker-compose.yml	View in code
	Controller creating containers without dropped capabilities	docker-compose.yml	View in code
	CPU Limits Not Set	docker-compose.yml	View in code
	CPU Limits Not Set	docker-compose.yml	View in code
	CPU Limits Not Set	docker-compose.yml	View in code
	CPU Limits Not Set	docker-compose.yml	View in code
	Container Memory Limits Not Defined	docker-compose.yml	View in code
	Container Memory Limits Not Defined	docker-compose.yml	View in code
	Container Memory Limits Not Defined	docker-compose.yml	View in code
	Container Memory Limits Not Defined	docker-compose.yml	View in code
	Container Traffic Not Bound to Host Interface	docker-compose.yml	View in code
	Container Traffic Not Bound to Host Interface	docker-compose.yml	View in code
	Container Traffic Not Bound to Host Interface	docker-compose.yml	View in code
	Container Traffic Not Bound to Host Interface	docker-compose.yml	View in code
	Container Healthcheck Not Defined	docker-compose.yml	View in code
	Container Healthcheck Not Defined	docker-compose.yml	View in code
	Docker Compose Volumes Shared Between Containers	docker-compose.yml	View in code
	Ensure that, if applicable, SELinux security options are set (Automated)	docker-compose.yml	View in code
	Ensure that, if applicable, SELinux security options are set (Automated)	docker-compose.yml	View in code
	Ensure that, if applicable, SELinux security options are set (Automated)	docker-compose.yml	View in code
	Ensure that, if applicable, SELinux security options are set (Automated)	docker-compose.yml	View in code

[orca-security-in]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca