style(simulation): cargo fmt on the T-1174 batch (gate bounce)

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

server/src/atlas/district_profile.rs

@@ -2240,10 +2240,7 @@ mod tests {
             None,
         );
 
-        assert_eq!(
-            districts[&cell_east].basin_direction,
-            BasinDirection::East
-        );
+        assert_eq!(districts[&cell_east].basin_direction, BasinDirection::East);
         assert_eq!(
             districts[&cell_south].basin_direction,
             BasinDirection::South
@@ -3147,7 +3144,11 @@ mod tests {
         let districts = derive_all_districts(test_seed(), &params, &ta, 8, "test_body", None, None);
         // BTreeMap iterates in sorted key order — verify the first key is (0,0).
         let first = districts.keys().next().expect("at least one district");
-        assert_eq!(*first, SurveyCellPos(0, 0), "first district must be at origin");
+        assert_eq!(
+            *first,
+            SurveyCellPos(0, 0),
+            "first district must be at origin"
+        );
     }
 
     #[test]