Add Docker setup with AI ensemble integration and execution loop

Dockerize the order executor with python:3.11-slim, add docker-compose
with config volume mount for hot-reload of system.yaml settings. Integrate
AI ensemble validation into order execution pipeline and add configurable
interval loop (default 60s) to replace container restart cycling.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

requirements.docker.txt

@@ -0,0 +1,13 @@
+pandas>=2.0
+numpy>=1.24
+scipy>=1.10
+scikit-learn==1.8.0
+lightgbm>=4.0
+matplotlib>=3.7
+plotly>=5.0
+pyarrow>=14.0
+oandapyV20==0.7.2
+requests>=2.28
+supabase>=2.0
+python-dotenv>=1.0
+PyYAML>=6.0