[stable2409] Backport #5747 (#5786)

Backport #5747 into `stable2409` from yrong.

See the
[documentation](https://github.com/paritytech/polkadot-sdk/blob/master/docs/BACKPORT.md)
on how to use this bot.

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Co-authored-by: Ron <yrong1997@gmail.com>

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bridge-hub-westend-runtime"
-version = "0.2.0"
+version = "0.3.0"
 authors.workspace = true
 edition.workspace = true
 description = "Westend's BridgeHub parachain runtime"

cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/src/lib.rs

@@ -100,6 +100,8 @@ use snowbridge_core::{
 use testnet_parachains_constants::westend::{consensus::*, currency::*, fee::WeightToFee, time::*};
 use xcm::VersionedLocation;
 
+use westend_runtime_constants::system_parachain::{ASSET_HUB_ID, BRIDGE_HUB_ID};
+
 /// The address format for describing accounts.
 pub type Address = MultiAddress<AccountId, ()>;
 
@@ -152,6 +154,11 @@ pub type Migrations = (
 	>,
 	// permanent
 	pallet_xcm::migration::MigrateToLatestXcmVersion<Runtime>,
+	snowbridge_pallet_system::migration::v0::InitializeOnUpgrade<
+		Runtime,
+		ConstU32<BRIDGE_HUB_ID>,
+		ConstU32<ASSET_HUB_ID>,
+	>,
 );
 
 parameter_types! {
@@ -209,7 +216,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("bridge-hub-westend"),
 	impl_name: create_runtime_str!("bridge-hub-westend"),
 	authoring_version: 1,
-	spec_version: 1_016_000,
+	spec_version: 1_016_001,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 5,

prdoc/pr_5747.prdoc

@@ -0,0 +1,13 @@
+title: "Snowbridge runtime migration on Westend"
+
+doc:
+  - audience: Runtime Dev
+    description: |
+      This is a backport for https://github.com/paritytech/polkadot-sdk/pull/5074 which missed 
+      the runtime migration to initialize channels of the bridge.
+
+crates:
+  - name: bridge-hub-westend-runtime
+    bump: patch
+
+