Get Supported Networks

Every chain with ERC-8004 registries, and what each one can actually do.

This is the endpoint an agent reads BEFORE choosing where its reputation lives, so the distinction has to be visible here or the choice is made blind: having a Reputation Registry is not the same as being able to write a rating that carries YOUR name. Only chains with a deployed FeedbackDelegate can — everywhere else the Facilitator ends up as the on-chain author, which is what the relay rail exists to end.