Real-Time Wearable Device Health Metrics Aggregation API

Create a scalable FastAPI endpoint that can simultaneously ingest and process streaming health metrics from multiple wearable devices (fitness trackers, smartwatches). Develop robust data validation for heart rate, steps, sleep patterns, and blood oxygen levels. Implement rate limiting, handle device-specific data normalization, and create a pandas-based analytics pipeline that can generate real-time health risk assessments. Include advanced error handling for inconsistent sensor data and support multiple authentication methods.