style: cargo fmt

Pre-existing whitespace drift in test bodies, normalized by rustfmt.
No behavior change.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ai/face_client.rs

@@ -383,7 +383,10 @@ mod tests {
         // body cap and rejected normal-size photos before they reached
         // the backend.
         assert!(is_transient(&classify_error_response(408, "")));
-        assert!(is_transient(&classify_error_response(413, "<html>nginx</html>")));
+        assert!(is_transient(&classify_error_response(
+            413,
+            "<html>nginx</html>"
+        )));
         assert!(is_transient(&classify_error_response(429, "{}")));
     }