Add complete Ouroboros trading system with TDD test suite

Implement the full autonomous trading agent architecture:
- KIS broker with async API, token refresh, leaky bucket rate limiter, and hash key signing
- Gemini-powered decision engine with JSON parsing and confidence threshold enforcement
- Risk manager with circuit breaker (-3% P&L) and fat finger protection (30% cap)
- Evolution engine for self-improving strategy generation via failure analysis
- 35 passing tests written TDD-first covering risk, broker, and brain modules
- CI/CD pipeline, Docker multi-stage build, and AI agent context docs

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,30 @@
+services:
+  ouroboros:
+    build:
+      context: .
+      target: production
+    container_name: ouroboros
+    restart: unless-stopped
+    env_file:
+      - .env
+    volumes:
+      - trade_data:/app/data
+    command: ["--mode=paper"]
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
+
+  # Run tests (one-shot)
+  test:
+    build:
+      context: .
+      target: base
+    container_name: ouroboros-test
+    command: ["pytest", "-v", "--cov=src", "--cov-report=term-missing"]
+    profiles:
+      - test
+
+volumes:
+  trade_data: