Design a secure protocol that notifies miners whether they should mine in any given moment

[stasatdaglabs]

The currently implemented solution is as follows:

• The miner regularly requests block templates from kaspad
• Kaspad includes a field called IsSynced within every block template response
• The miner is recommended to skip any template in which IsSynced is false
• Kaspad sets IsSynced = false when it is in IBD

This is open to trivial data availability attacks. Propose a secure protocol to replace it.

[elichai]

After a design it should be approximately a day

[someone235]

Maybe it's enough to just revert #1356