Fix module-level docstring: run_stop_check schedule description

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

apps/orb_trader/engine.py

@@ -6,7 +6,7 @@ The scheduler calls phase methods in order:
   2. run_orb_detection() — 09:40 ET (intraday bars → candidates)
      └─ run_pre_screen 미실행 시 full fallback (daily bars도 자체 fetch)
   3. run_breakout_check() — 09:45...10:15 ET (called 7 times, every 5 min)
-  4. run_stop_check()   — 11:10, 12:40, 14:10, 15:40 ET (90-min checkpoints)
+  4. run_stop_check()   — every sim_bar_minutes from orb_end until 15:55 ET
   5. run_eod_exit()     — 15:55 ET
   6. run_post_close()   — 16:00 ET