Show initial and current roll position size plus rolling status on active roll groups table.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_strategy_roll_ui_lib.py

@@ -30,6 +30,8 @@ def test_compute_roll_chain_metrics_short():
     assert per_leg[10]["avg_entry_after"] is not None
     assert per_leg[11]["avg_entry_after"] is not None
     assert group_metrics["reward_at_tp_usdt"] is not None
+    assert group_metrics["initial_qty"] == 3.0
+    assert group_metrics["current_qty"] == 8.0
     assert per_leg[11]["reward_at_tp_usdt"] >= per_leg[10]["reward_at_tp_usdt"]