Calc: SUBTOTAL(10x) recalculates when Row Height, AutoFit Row Height or Ungroup reveal rows

home.rowHeight, home.autofitRowHeight and data.ungroup change row hidden
state without marking the edit structural, so SUBTOTAL(101-111) kept a stale
value. Found by the command-sequence fuzz (seed 3).

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/data.rs

@@ -1129,6 +1129,7 @@ fn group(s: &mut Session, p: &Json, on: bool) -> Result<Json> {
         {
             e.collapsed = false;
         }
+        cx.structural = true; // ungrouping reveals hidden rows: SUBTOTAL(10x) depends on it
         Ok(Json::Null)
     })
 }