style: Migrate to stable-only rustfmt configuration

- Remove nightly-only features from .rustfmt.toml and vendor/ss58-registry/rustfmt.toml
- Removed features: imports_granularity, wrap_comments, comment_width,
  reorder_impl_items, spaces_around_ranges, binop_separator,
  match_arm_blocks, trailing_semicolon, trailing_comma
- Format all 898 affected files with stable rustfmt
- Ensures long-term reliability without nightly toolchain dependency

pezcumulus/teyrchains/pezpallets/referral/src/lib.rs

@@ -266,8 +266,8 @@ pub mod pezpallet {
 		fn on_kyc_approved(who: &T::AccountId, referrer: &T::AccountId) {
 			// Security check: Verify on-chain that the user's KYC status is actually
 			// "Approved" before confirming the referral.
-			if pezpallet_identity_kyc::Pezpallet::<T>::get_kyc_status(who) ==
-				pezpallet_identity_kyc::types::KycLevel::Approved
+			if pezpallet_identity_kyc::Pezpallet::<T>::get_kyc_status(who)
+				== pezpallet_identity_kyc::types::KycLevel::Approved
 			{
 				// Check if this referral already exists (prevent double-counting)
 				if Referrals::<T>::contains_key(who) {

pezcumulus/teyrchains/pezpallets/referral/src/mock.rs

@@ -1,10 +1,7 @@
 // pezkuwi/pallets/referral/src/mock.rs (Updated for new trustless model)
 
 use crate as pezpallet_referral;
-use pezframe_support::{
-	construct_runtime, derive_impl, parameter_types,
-	traits::ConstU128,
-};
+use pezframe_support::{construct_runtime, derive_impl, parameter_types, traits::ConstU128};
 use pezframe_system::EnsureRoot;
 use pezsp_core::H256;
 use pezsp_runtime::BuildStorage;

pezcumulus/teyrchains/pezpallets/referral/src/tests.rs

@@ -1,6 +1,5 @@
 use crate::{
-	mock::*, Error, Event, PendingReferrals, ReferralCount, Referrals,
-	ReferrerStatsStorage,
+	mock::*, Error, Event, PendingReferrals, ReferralCount, Referrals, ReferrerStatsStorage,
 };
 use pezframe_support::{assert_noop, assert_ok};
 use pezpallet_identity_kyc::types::{OnCitizenshipRevoked, OnKycApproved};