Request: extend the block_header API endpoint to report block's timestamp

[cortze]

Hey there, could the V2 API schema be extended to provide the block's timestamp in its header?

I'm talking about this endpoint:

GET /v2/blocks/{block_number}/header

It would be useful to have this data already from the API call, and not have to compute it myself (the light client delays in providing the block header in some occasions, and that affects other internal operations).

The UTC timestamp of the block at its proposal would be best. The sampling scheduled task heavily relies on this timestamp, and I'd prefer to have the most accurate one.