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/.gitignore

@@ -0,0 +1,79 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Virtual Environment
+venv/
+ENV/
+env/
+.venv
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Secrets
+.env
+*.key
+*.pem
+config/secrets.yaml
+config/*.secret.*
+
+# Logs
+*.log
+logs/
+
+# Data
+*.parquet
+*.csv
+*.db
+*.sqlite
+
+# Nautilus
+.nautilus/
+nautilus_cache/
+
+# Redis
+dump.rdb
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Dev noise
+error_log*.txt
+clean_log*.txt
+out.txt
+*_log.txt
+*_report.txt
+*_run.txt
+*_out.txt
+*_clean.txt
+backtest_results/