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.

nautilus_dolphin/tests/debug_path.py

@@ -0,0 +1,16 @@
+from pathlib import Path
+import sys
+
+print(f"File: {__file__}")
+hcm_dir = Path(__file__).parent.parent.parent
+print(f"HCM_DIR: {hcm_dir}")
+nd_dir = hcm_dir / "nautilus_dolphin"
+print(f"ND_DIR: {nd_dir}")
+sys.path.insert(0, str(nd_dir))
+print(f"Path: {sys.path[:1]}")
+
+try:
+    from nautilus_dolphin.nautilus.dolphin_actor import DolphinActor
+    print("Import: SUCCESS")
+except ImportError as e:
+    print(f"Import: ERROR ({e})")