added more relay and message-lane pallet logs (#527)

bridges/relays/substrate/src/headers_pipeline.rs

@@ -159,6 +159,13 @@ pub async fn run<SourceChain, TargetChain, P>(
 		source_justifications,
 	);
 
+	log::info!(
+		target: "bridge",
+		"Starting {} -> {} headers relay",
+		SourceChain::NAME,
+		TargetChain::NAME,
+	);
+
 	headers_relay::sync_loop::run(
 		HeadersSource::new(source_client),
 		SourceChain::AVERAGE_BLOCK_INTERVAL,

bridges/relays/substrate/src/millau_messages_to_rialto.rs

@@ -112,6 +112,12 @@ pub fn run(
 		relayer_id_at_source: relayer_id_at_millau,
 	};
 
+	log::info!(
+		target: "bridge",
+		"Starting Millau -> Rialto messages relay. Millau relayer account id: {:?}",
+		lane.relayer_id_at_source,
+	);
+
 	messages_relay::message_lane_loop::run(
 		messages_relay::message_lane_loop::Params {
 			lane: lane_id,

bridges/relays/substrate/src/rialto_messages_to_millau.rs

@@ -112,6 +112,12 @@ pub fn run(
 		relayer_id_at_source: relayer_id_at_rialto,
 	};
 
+	log::info!(
+		target: "bridge",
+		"Starting Rialto -> Millau messages relay. Rialto relayer account id: {:?}",
+		lane.relayer_id_at_source,
+	);
+
 	messages_relay::message_lane_loop::run(
 		messages_relay::message_lane_loop::Params {
 			lane: lane_id,