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

bizinikiwi/client/transaction-pool/src/common/enactment_state.rs

@@ -107,8 +107,9 @@ where
 		// do not proceed with txpool maintain if block distance is too high
 		let skip_maintenance =
 			match (hash_to_number(new_hash), hash_to_number(self.recent_best_block)) {
-				(Ok(Some(new)), Ok(Some(current))) =>
-					new.saturating_sub(current) > SKIP_MAINTENANCE_THRESHOLD.into(),
+				(Ok(Some(new)), Ok(Some(current))) => {
+					new.saturating_sub(current) > SKIP_MAINTENANCE_THRESHOLD.into()
+				},
 				_ => true,
 			};
 

bizinikiwi/client/transaction-pool/src/common/tests.rs

@@ -178,8 +178,9 @@ impl ChainApi for TestApi {
 	) -> Result<Option<NumberFor<Self>>, Self::Error> {
 		Ok(match at {
 			BlockId::Number(num) => Some(*num),
-			BlockId::Hash(hash) if *hash == H256::from_low_u64_be(hash.to_low_u64_be()) =>
-				Some(hash.to_low_u64_be()),
+			BlockId::Hash(hash) if *hash == H256::from_low_u64_be(hash.to_low_u64_be()) => {
+				Some(hash.to_low_u64_be())
+			},
 			BlockId::Hash(_) => None,
 		})
 	}