Support Kafka Partition Key

[whoAbhishekSah]

Summary

Raccoon doesn't support partition keys when producing messages to a Kafka Topic. Currently, it produces the message to any random partition(ref).

This is a feature request to support the partition key for each message in the API and SDK.

Proposed solution

Enable POST /api/v1/events to support this payload !

{
  "req_guid": "1234abcd",
  "sent_time": {
    "seconds": 1638154927,
    "nanos": 376499000
  },
  "events": [
    {
      "eventBytes": "Cg4KCHNlcnZpY2UxEgJBMRACIAEyiQEKJDczZTU3ZDlhLTAzMjQtNDI3Yy1hYTc5LWE4MzJjMWZkY2U5ZiISCcix9QzhsChAEekGEi1cMlNAKgwKAmlkEgJpZBjazUsyFwoDaU9zEgQxMi4zGgVBcHBsZSIDaTEwOiYKJDczZTU3ZDlhLTAzMjQtNDI3Yy1hYTc5LWE4MzJjMWZkY2U5Zg==",
      "type": "booking",
      "partition_key": "some-key"        // <----------------new key support
    }
  ]
}

Additional context