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/subsystem-util/src/database.rs

@@ -217,8 +217,9 @@ pub mod paritydb_impl {
 				}
 				return match ops.next() {
 					None => None,
-					Some(DBOp::Insert { col, key, value }) =>
-						Some((col as u8, key.to_vec(), Some(value))),
+					Some(DBOp::Insert { col, key, value }) => {
+						Some((col as u8, key.to_vec(), Some(value)))
+					},
 					Some(DBOp::Delete { col, key }) => Some((col as u8, key.to_vec(), None)),
 					Some(DBOp::DeletePrefix { col, prefix }) => {
 						let col = col as u8;