Add retry to wallet WS before falling back to HTTP

[thesimplekid]

Tracking issue so we don't forget about the TODO comment.

cdk/crates/cdk/src/wallet/subscription/ws.rs

Lines 169 to 175 in 2462168

	WsMessageOrResponse::ErrorResponse(error) => {
	tracing::error!("Received error from server: {:?}", error);
	if subscription_requests.contains(&error.id) {
	// If the server sends an error response to a subscription request, we should
	// fallback to HTTP.
	// TODO: Add some retry before giving up to HTTP.
	return fallback_to_http(