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/metrics/src/runtime/mod.rs

@@ -184,12 +184,15 @@ impl RuntimeMetricsProvider {
 	// Parse end execute the update operation.
 	fn parse_metric_update(&self, update: RuntimeMetricUpdate) {
 		match update.op {
-			RuntimeMetricOp::IncrementCounterVec(value, ref labels) =>
-				self.inc_counter_vec_by(update.metric_name(), value, labels),
-			RuntimeMetricOp::IncrementCounter(value) =>
-				self.inc_counter_by(update.metric_name(), value),
-			RuntimeMetricOp::ObserveHistogram(value) =>
-				self.observe_histogram(update.metric_name(), value),
+			RuntimeMetricOp::IncrementCounterVec(value, ref labels) => {
+				self.inc_counter_vec_by(update.metric_name(), value, labels)
+			},
+			RuntimeMetricOp::IncrementCounter(value) => {
+				self.inc_counter_by(update.metric_name(), value)
+			},
+			RuntimeMetricOp::ObserveHistogram(value) => {
+				self.observe_histogram(update.metric_name(), value)
+			},
 		}
 	}