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.

.gitignore

@@ -0,0 +1,91 @@
+# ═══════════════════════════════════════════════════════════════════
+# DOLPHIN — .gitignore
+# Policy: track source + configs + docs + critical model files;
+# exclude runtime caches, logs, and large reproducible artifacts.
+# Derived from dolphinng5_predict/.gitignore with DOLPHIN-scoped fixes:
+#   - nautilus_dolphin/ is a FIRST-CLASS subdir here (not a sub-repo)
+#   - adaptive_exit/models/ (*.pkl, *.parquet) IS tracked — critical AEM files
+#   - nautilus_dolphin/dvae/ IS tracked — ongoing work, preserved per user
+# ═══════════════════════════════════════════════════════════════════
+
+# ── Virtual environments ────────────────────────────────────────────
+.venv/
+venv/
+env/
+siloqy-env/
+
+# ── Python cache ────────────────────────────────────────────────────
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.pytest_cache/
+.hypothesis/
+
+# ── IDE / tool dirs ─────────────────────────────────────────────────
+.kiro/
+.vscode/settings.json
+.idea/
+.claude/
+.crush/
+
+# ── Jupyter ─────────────────────────────────────────────────────────
+.ipynb_checkpoints/
+
+# ── VBT Parquet caches (large, reconstructable) ─────────────────────
+vbt_cache/
+vbt_cache_*/
+
+# ── Data caches / backfills (large, reconstructable) ────────────────
+backfilled_data/
+klines_cache/
+arrow_backfill/
+ob_data/
+ob_cache/
+matrices/
+eigenvalues/
+eso_cache/
+
+# ── ML model dumps — ROOT LEVEL ONLY (preserve in-module models/) ───
+/models/
+/trained_models/
+/checkpoints/
+/checkpoints_10k/
+/checkpoints_production/
+/genesis_vae_model/
+/mlruns/
+
+# ── MC / backtest / experiment / benchmark result data ──────────────
+mc_results/
+mc_results_test/
+benchmark_results/
+backtest_results/
+backtest_results_*/
+results/
+vbt_results/
+hcm_experiments/
+hcm_experiments_*/
+hd_cache/
+hd_hcm_regime_results/
+rolling_*_results/
+paper_trading_*_results/
+titan_ultra_vbt_results/
+monitoring_data/
+training_reports/
+
+# ── Logs (large, ephemeral) ─────────────────────────────────────────
+logs/
+run_logs/
+*.log
+*.log.*
+
+# ── Secrets / env ───────────────────────────────────────────────────
+.env
+.env.*
+
+# ── Temp / scratch ──────────────────────────────────────────────────
+temp_test/
+tmp/
+*.swp
+*.swo
+*~