Direct HTTP announce should include topic name

[masih]

The concept topic is present in gossipsub announcements which separates publications by network name. But direct HTTP announce has no such primitive defined in message schema.

We most likely want the topic separation at IPNI protocol level to reduce testing noise from non-mainnet announcements.

[masih]

• graphsync publushers expose this via libp2p protocol name.
• the new IPNI sync includes topic as an optional field .
• The old HTTP publishers do not have this primitive.

[masih]

Looks like we are covered in ipni sync going forward. closing.