OPENAI_API_KEY=your_openai_api_key_here OPENAI_MODEL=gpt-4o OPENAI_TEMPERATURE=0.0 OPENAI_PROXY_URL='socks5h://37.18.73.60:5566' # socks5 recommended DB_PATH=./data/wiki.db MAX_CONCURRENT_LLM=5 OPENAI_RPM=200 MAX_CONCURRENT_WIKI=10 LOG_LEVEL=INFO LOG_FORMAT=json CHUNK_SIZE=2000 CHUNK_OVERLAP=200 MAX_RETRIES=3 RETRY_DELAY=1.0 CIRCUIT_FAILURE_THRESHOLD=5 CIRCUIT_RECOVERY_TIMEOUT=60