style: cargo fmt the workspace (release-gate cargo-fmt was red)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

core/archipelago/src/mesh/mod.rs

@@ -2327,7 +2327,10 @@ mod tests {
         // Force the dev fallback even if a packaged binary happens to exist
         // on this machine's PATH convention — this test wants exactly the
         // freshly-built venv daemon under test.
-        std::env::set_var("ARCHY_RETICULUM_DAEMON_BIN", "/nonexistent-force-dev-fallback");
+        std::env::set_var(
+            "ARCHY_RETICULUM_DAEMON_BIN",
+            "/nonexistent-force-dev-fallback",
+        );
 
         let data_dir = root.path().join("node");
         std::fs::create_dir_all(data_dir.join("identity")).unwrap();