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.

adaptive_exit/__init__.py

@@ -0,0 +1,3 @@
+# Smart Adaptive Exit Engine — per-bucket MAE/MFE continuation model
+# Phase 1: offline training on NG7/VBT price data
+# Phase 2: parallel shadow mode wired into BLUE per-trade