initial: import DOLPHIN baseline 2026-04-21 from dolphinng5_predict working tree

Includes core prod + GREEN/BLUE subsystems:
- prod/ (BLUE harness, configs, scripts, docs)
- nautilus_dolphin/ (GREEN Nautilus-native impl + dvae/ preserved)
- adaptive_exit/ (AEM engine + models/bucket_assignments.pkl)
- Observability/ (EsoF advisor, TUI, dashboards)
- external_factors/ (EsoF producer)
- mc_forewarning_qlabs_fork/ (MC regime/envelope)

Excludes runtime caches, logs, backups, and reproducible artifacts per .gitignore.

prod/smoke_backtest.py

@@ -0,0 +1,15 @@
+import sys
+import os
+from pathlib import Path
+
+# Load original script logic
+_PROD_DIR = Path(__file__).resolve().parent
+sys.path.insert(0, str(_PROD_DIR))
+
+import nautilus_actor_56day_backtest as bt
+
+if __name__ == '__main__':
+    # Override window for smoke test
+    bt.WINDOW_END = '2025-12-31'
+    print("SMOKE TEST: Running 1-day backtest (2025-12-31)")
+    bt.run_backtest()