feat: make Ollama model configurable via OLLAMA_MODEL env var

- Add OLLAMA_MODEL setting to shared config (default: qwen3:32b)
- LLM router reads from settings instead of hardcoded model name
- Create .env file with all configurable settings documented
- docker-compose passes OLLAMA_MODEL to llm-pool container

To change the model: edit OLLAMA_MODEL in .env and restart llm-pool.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -66,9 +66,10 @@ services:
     environment:
       - ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY:-}
       - OPENAI_API_KEY=${OPENAI_API_KEY:-}
-      - OLLAMA_BASE_URL=http://host.docker.internal:11434
+      - OLLAMA_BASE_URL=${OLLAMA_BASE_URL:-http://host.docker.internal:11434}
+      - OLLAMA_MODEL=${OLLAMA_MODEL:-qwen3:32b}
       - REDIS_URL=redis://redis:6379/0
-      - LOG_LEVEL=INFO
+      - LOG_LEVEL=${LOG_LEVEL:-INFO}
     restart: unless-stopped
     healthcheck:
       test: ["CMD-SHELL", "curl -sf http://localhost:8004/health || exit 1"]