getBlobSidecars is missing metadata fields in response

[nflaig]

It looks like getBlobSidecars API does not include execution_optimistic and finalized fields

beacon-APIs/apis/beacon/blob_sidecars/blob_sidecars.yaml

Lines 34 to 37 in fc89ec5

	required: [data]
	properties:
	data:
	$ref: "../../../beacon-node-oapi.yaml#/components/schemas/Deneb.BlobSidecars"

Whereas the getBlockV2 does and even includes version which we might wanna add for blobs as well

beacon-APIs/apis/beacon/blocks/block.v2.yaml

Line 25 in fc89ec5

required: [version, execution_optimistic, finalized, data]

I don't see any discussion on this in #286, so I guess it was just missed?