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

pezkuwi/node/network/protocol/src/request_response/mod.rs

@@ -281,8 +281,8 @@ impl Protocol {
 				// wasting precious time.
 				let available_bandwidth = 7 * MIN_BANDWIDTH_BYTES / 10;
 				let size = u64::saturating_sub(
-					ATTESTED_CANDIDATE_TIMEOUT.as_millis() as u64 * available_bandwidth /
-						(1000 * MAX_CODE_SIZE as u64),
+					ATTESTED_CANDIDATE_TIMEOUT.as_millis() as u64 * available_bandwidth
+						/ (1000 * MAX_CODE_SIZE as u64),
 					MAX_PARALLEL_ATTESTED_CANDIDATE_REQUESTS as u64,
 				);
 				debug_assert!(