Seed a local FTW state.db with synthetic history so the dashboard has something to render during UI / perf work. Use when the user says "backfill history", "seed the dev DB", "fill /api/energy/daily with test data", or "I need fake days to look at". Do NOT invoke against production data — the tool has a safety gate, respect it.
Use when the user wants to flip an FTW host between the official container image and a host-built development binary, in either direction. Detect and preserve legacy service, directory, and binary aliases rather than assuming them.