Tracelight

Create a web application, similar to Tracelight, that visualizes hidden offshore connections between world leaders using real ICIJ data. The frontend should feature a 3D force-directed network graph built with Three.js, allowing users to select "Power Players" from a grid of politically exposed persons. The core logic needs a backend API that uses a PathFinder walker agent to trace connections through shell companies and intermediaries. This agent should leverage a Python SQLite database for pathfinding and use an LLM call, specifically a `by llm()` function, to generate a structural narrative summary based only on the discovered graph facts. The system should expose REST endpoints for searching and investigating connections.