Design fast search for AV raw logs

Autonomous vehicles collect large volumes of **raw logs** (e.g., sensor streams, perception outputs, planning/debug signals). In these logs, there may be situations such as: - A **pedestrian** crossing - A **traffic sign** appearing (stop sign, speed limit sign, etc.) Design a system that allows engineers to **quickly find** log segments where these situations **might occur**. ### Requirements - Users should be able to query for scenarios like “pedestrian present”, “stop sign detected”, optionally with filters such as time range, vehicle/software version, geography, route, weather, etc. - Results should point to the **exact time ranges** (segments) in logs. - Logs are large-scale (many vehicles, continuous uploads). ### Clarify Explain what signals you would rely on (raw sensor vs derived perception outputs), how you index/search, and how the system scales.