Update develop to patch-polkadot-sdk

Allows us to finally remove the old `serai-dex/substrate` repository _and_
should have CI pass without issue on `develop` again.

The changes made here should be trivial and maintain all prior
behavior/functionality. The most notable are to `chain_spec.rs`, in order to
still use a SCALE-encoded `GenesisConfig` (avoiding `serde_json`).

processor/Cargo.toml

@@ -76,7 +76,7 @@ message-queue = { package = "serai-message-queue", path = "../message-queue", op
 [dev-dependencies]
 frost = { package = "modular-frost", path = "../crypto/frost", features = ["tests"] }
 
-sp-application-crypto = { git = "https://github.com/serai-dex/substrate", default-features = false, features = ["std"] }
+sp-application-crypto = { git = "https://github.com/serai-dex/patch-polkadot-sdk", rev = "7f2a8865cd0ded35e1d62fc330915d44dfa3beab", default-features = false, features = ["std"] }
 
 ethereum-serai = { path = "../networks/ethereum", default-features = false, features = ["tests"] }
 

processor/messages/src/lib.rs

@@ -1,3 +1,5 @@
+#![expect(clippy::cast_possible_truncation)]
+
 use std::collections::HashMap;
 
 use scale::{Encode, Decode};

processor/src/networks/ethereum.rs

@@ -1,3 +1,5 @@
+#![allow(deprecated)]
+
 use core::{fmt, time::Duration};
 use std::{
   sync::Arc,

processor/src/slash_report_signer.rs

@@ -183,7 +183,7 @@ impl SlashReportSigner {
                 .report
                 .clone()
                 .into_iter()
-                .map(|(validator, points)| (Public(validator), points))
+                .map(|(validator, points)| (Public::from(validator), points))
                 .collect::<Vec<_>>(),
             ),
           ) {

processor/src/tests/cosigner.rs

@@ -118,7 +118,7 @@ fn test_cosigner() {
         assert_eq!(signed_block, block);
         assert!(Public::from_raw(keys[&participant_one].group_key().to_bytes()).verify(
           &cosign_block_msg(block_number, block),
-          &Signature(signature.try_into().unwrap())
+          &Signature::from(<[u8; 64]>::try_from(signature).unwrap())
         ));
       }
       _ => panic!("didn't get cosigned block back"),

processor/src/tests/key_gen.rs

@@ -125,7 +125,7 @@ pub fn test_key_gen<N: Network>() {
     let KeyConfirmed { mut substrate_keys, mut network_keys } = key_gen.confirm(
       &mut txn,
       ID.session,
-      &KeyPair(sr25519::Public(res.0), res.1.clone().try_into().unwrap()),
+      &KeyPair(sr25519::Public::from(res.0), res.1.clone().try_into().unwrap()),
     );
     txn.commit();