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changes.mady.by.user Michael André Pearce

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  1. Use an attribute bit as a tombstone flag on the core message format.
  2. This "tombstone" attribute bit is only used by the broker when a topic is configured for compaction. 
    1. If the topic is not configured for compaction it will be set and on the record and available to be read but will not cause message deletion by the broker.
    2. This will need to be added to end user documention.

  3. Add a tombstone boolean field to ProducerRecord and ConsumerRecord. 

  4. Add constructor param on ProducerRecord to set the tombstone on creation of a Record
  5. Add accessor methods on the Producer/ConsumerRecord void setTombstone(boolean isTombstone) and a boolean isTombstone()
  6. Add ProduceRequest/ProduceResponse V4 which uses the new message format.
  7. Add FetchRequest/FetchResponse V4 which uses the new message format.

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