Investigate delays in foreign client code

[romac]

hermes/crates/relayer/src/foreign_client.rs

Lines 1446 to 1447 in 17ba1b5

	// FIXME(romac): Why do we need this, and shouldn't we wait somewhere else up the call stack?
	thread::sleep(Duration::from_millis(200));

Originally posted by @romac in #3224 (comment)

[romac]

Let's also look at those when we get to it:

• Detect light client attacks and report them to both the chain and the RPC node #3224 (comment)
• Detect light client attacks and report them to both the chain and the RPC node #3224 (comment)