- GET /api/locations (inclusive time window start/end, pagination, cap 5000)
- GET /api/poo (pagination, cap 1000, newest first)
- GET /api/public-ip (current state + recent history, cap 1000)
- all session-protected, read-only, bounded (no full-table export)
- typed response schemas; register router; regenerate openapi/
- tests/test_api_data.py
