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/bridge/src/tx/mod.rs

@@ -288,8 +288,9 @@ where
 							metrics.on_message("chunk_fetching_v1")
 						}
 					},
-					Requests::AvailableDataFetchingV1(_) =>
-						metrics.on_message("available_data_fetching_v1"),
+					Requests::AvailableDataFetchingV1(_) => {
+						metrics.on_message("available_data_fetching_v1")
+					},
 					Requests::CollationFetchingV1(_) => metrics.on_message("collation_fetching_v1"),
 					Requests::CollationFetchingV2(_) => metrics.on_message("collation_fetching_v2"),
 					Requests::PoVFetchingV1(_) => metrics.on_message("pov_fetching_v1"),