Truncate messages if compressed size exceeds 5MB

[bmikaili]

The Logs Intake API has a limit for the total size of a payload (5MB). We should figure out a logic to truncate those messages while retaining their JSON structure so they can be ingested properly.

Example of structure:

[
  {
    "ddsource": "kafka-connect",
    "message": "hello"
  },
  {
    "ddsource": "kafka-connect",
    "message": "world"
  }
]