Lion - dapplion

From the last two days, the leak is clearly visible, with an impact of 75MB / day 

Review same potentially pending items for bellatrix fork

> It is mostly used in objects that are using "$ref" because "allOf" allows to override certain referenced properties. ExecutionOptimistic is probably just copy pasta mistake At least in AJV...

Also, why need to override the example here? https://github.com/ethereum/beacon-APIs/blob/9cab46ad3c94a4a2779b42fa21f6bb1955b60b56/apis/beacon/states/committee.yaml#L16-L19 The example is useful https://github.com/ethereum/beacon-APIs/blob/9cab46ad3c94a4a2779b42fa21f6bb1955b60b56/types/primitive.yaml#L27-L29

:+1: on coupling

How can this be unblocked? @timbeiko we need protocol support

Would be good to check in with explorers and other data consumers to understand the real value of adding this property.

At least for Lodestar, (on a preliminary look, not implemented yet) the previous approach won't require a full sweep of the validator set. We do all sweeps in epoch processing...

> > At least for Lodestar, (on a preliminary look, not implemented yet) the previous approach won't require a full sweep of the validator set. We do all sweeps in...

IMO opinion this PR does not add any tangible benefits in performance, while slowing full withdrawals for no reason. Partial withdrawals are processed "slowly" because we have to. Full withdrawals...