Adds osrm-foot, osrm-bicycle, and otp services to Docker Compose under
a 'routing' profile (opt-in). Setup scripts download Greater London OSM
data and pre-process for OSRM foot/bicycle profiles, plus TfL GTFS for
OTP transit. Routing engine env vars added to .env.sample.
Per-user rate limits via Redis sliding window, IP-restricted /metrics
endpoint, audit logging of all requests, CORS tightening, and export
caps on listing/geojson endpoints.
The crawler subdirectory was the only active project. Moving it to the
repo root simplifies paths and removes the unnecessary nesting. The
vqa/ and immoweb/ directories were legacy/unused and have been removed.
Updated .drone.yml, .gitignore, .claude/ docs, and skills to reflect
the new flat structure.
