Merge branch 'develop' into next

This is an initial resolution of conflicts which does not work.

substrate/signals/primitives/src/lib.rs

@@ -5,7 +5,7 @@
 use scale::{Encode, Decode, MaxEncodedLen};
 use scale_info::TypeInfo;
 
-use serai_primitives::NetworkId;
+use serai_primitives::ExternalNetworkId;
 
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Encode, Decode, MaxEncodedLen, TypeInfo)]
 #[cfg_attr(feature = "std", derive(zeroize::Zeroize))]
@@ -13,5 +13,5 @@ use serai_primitives::NetworkId;
 #[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub enum SignalId {
   Retirement([u8; 32]),
-  Halt(NetworkId),
+  Halt(ExternalNetworkId),
 }