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/gossip-support/src/lib.rs

@@ -210,7 +210,7 @@ where
 						gum::debug!(target: LOG_TARGET, error = ?e);
 					}
 				},
-				FromOrchestra::Signal(OverseerSignal::BlockFinalized(_hash, _number)) =>
+				FromOrchestra::Signal(OverseerSignal::BlockFinalized(_hash, _number)) => {
 					if let Some(session_index) = self.last_session_index {
 						if let Err(e) = self
 							.build_topology_for_last_finalized_if_needed(
@@ -225,7 +225,8 @@ where
 								e
 							);
 						}
-					},
+					}
+				},
 				FromOrchestra::Signal(OverseerSignal::Conclude) => return self,
 			}
 		}
@@ -394,8 +395,8 @@ where
 					.await
 					.await??;
 
-			if finalized_session_index < self.min_known_session &&
-				Some(finalized_session_index) != self.finalized_needed_session
+			if finalized_session_index < self.min_known_session
+				&& Some(finalized_session_index) != self.finalized_needed_session
 			{
 				gum::debug!(
 					target: LOG_TARGET,