Update run_stop_check docstring to reflect dynamic sim_bar_minutes schedule

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/orb_trader/engine.py

@@ -648,12 +648,12 @@ class ORBTradingEngine:
             "remaining": len(still_pending),
         }
 
-    # ── Phase 4: Stop Check (90-min checkpoints) ──────────────────────────────
+    # ── Phase 4: Stop Check (sim_bar_minutes checkpoints) ────────────────────
 
     def run_stop_check(self, date_str: str) -> dict[str, Any]:
-        """Evaluate stops for all open positions using 90-min aggregated bars.
+        """Evaluate stops for all open positions using aggregated bars.
 
-        Called at 11:10, 12:40, 14:10, 15:40 ET.
+        Called every sim_bar_minutes from orb_end until 15:55 ET.
         Stop logic mirrors orb_simulator.py:477-580 exactly.
         """
         self._date_str = date_str