Publish all attestations on the Beacon API Event stream

[Savid]

Is your feature request related to a problem? Please describe.

It looks like only aggregated attestations from block imports are published on the /eth/v1/events attestation topic.

Describe the solution you'd like

Publish all attestations received from currently subscribed subnets on the /eth/v1/events attestation topic.

Additional context

Currently we run multiple CL clients and collect attestation data. Would love to also include Lodestar as one of the sources! Apologies if I've missed a CLI flag somewhere and this is already implemented. I also understand there could potential performance issues in implementing this. Thanks

[dapplion]

Hey @Savid happy to align Lodestar to other CL implementations. From your experience, do other clients emit attestation events for attestations received either via:

• block import
• gossip aggregated topic
• gossip unaggregated topic
• API post aggregated
• API post unaggregated

[Savid]

Awesome @dapplion! I only have experience from gossip/block imports as I haven't tested API. All other CL implementations are at least publishing gossip/block import attestations.
Naively I would say all of the items you listed are applicable; The node has received a valid attestation (from P2P or API), but selfishly I only require gossip/block import.