Add data to header-only GET /blocks

[purestaketdb]

Problem

The header-only flag for blocks is useful in keeping huge blocks from being passed around and is very appreciated. However, it would be helpful for additional options to be made available in the endpoint, either via query strings or additional methods.

Issues

• Using header-only conceals the number of tx in the block and their ids
• Large blocks are a feature not a bug

Solution

• Build a digest mode for the block that includes only the list of tx ids in the tx array (or the bare tx object framework without the data + the ID)
• Enable msgpack format
• allow pagination through a blocks tx

Dependencies

Urgency

Nice to have