Reject non mining protocol SetupConnection message in Pool

[Shourya742]

This PR enforces rejection of all downstream connections that do not use the mining protocol. It removes hardcoded address information from the SetupConnection message throughout the codebase and adds integration tests to cover the new behavior.

Closes: #92

[plebhash]

we should also assert for error_core

not sure if this will compile, but hopefully you get the point

Suggested change

	pool_translator_sniffer
	.wait_for_message_type(
	MessageDirection::ToDownstream,
	MESSAGE_TYPE_SETUP_CONNECTION_ERROR,
	)
	.await;
	pool_translator_sniffer
	.wait_for_message_type(
	MessageDirection::ToDownstream,
	MESSAGE_TYPE_SETUP_CONNECTION_ERROR,
	)
	.await;
	let setup_connection_error = sniffer.next_message_from_upstream();
	let setup_connection_error = match setup_connection_error {
	Some((_, AnyMessage::Common(CommonMessages::SetupConnectionError(msg)))) => msg,
	msg => panic!("Expected SetupConnectionError message, found: {:?}", msg),
	};
	assert_eq!(
	setup_connection_error.error_code, "unsupported-protocol",
	"SetupConnectionError message error code should be unsupported-protocol"
	);

[lucasbalieiro]

running this new test on my machine I always get a timeout, like the one the CI is showing now: https://github.com/stratum-mining/sv2-apps/actions/runs/20849689219/job/59901524348?pr=173

tested at 4634ca6

seems that the SetupConnection scenario is always triggered correctly but the test never finishes:

2026-01-09T15:12:48.966563Z  INFO integration_tests_sv2::utils: 🔍 Sv2 Sniffer 0 | Replaced: SetupConnection with SetupConnection | Direction: ⬆
2026-01-09T15:12:48.966715Z  INFO pool_sv2::downstream::common_message_handler: Received `SetupConnection`: version=2, flags=0
2026-01-09T15:12:48.966722Z  INFO pool_sv2::downstream::common_message_handler: Rejecting connection: SetupConnection asking for other protocols than mining protocol.
2026-01-09T15:12:48.966734Z ERROR pool_sv2::downstream: Failed to set up downstream connection e=Shutdown
2026-01-09T15:12:48.966742Z ERROR pool_sv2::status: Error in Downstream { downstream_id: 1, tx: Sender { .. } }: Shutdown
2026-01-09T15:12:48.966749Z  WARN pool_sv2::status: Downstream [1] shutting down due to error: Shutdown
2026-01-09T15:12:48.966754Z DEBUG pool_sv2::status: Sending status from Downstream [1]: DownstreamShutdown { downstream_id: 1, reason: Shutdown }
2026-01-09T15:12:48.966812Z  WARN pool_sv2: Downstream 1 disconnected — Channel manager.
2026-01-09T15:12:48.966840Z  INFO pool_sv2::channel_manager: Channel Manager: removing downstream after shutdown downstream_id=1
2026-01-09T15:12:48.966858Z  WARN pool_sv2::io_task: Reader task exited.
2026-01-09T15:12:48.966882Z  WARN pool_sv2::io_task: Writer task exited.
2026-01-09T15:12:48.966972Z ERROR stratum_apps::network_helpers::noise_connection: Reader: error while reading frame: SocketClosed

[lucasbalieiro]

after running with the latests patches the test pool_reject_setup_connection_with_non_mining_protocol now finishes as expected.

tested @ 8129fda