v1.0.0

First tagged release of the ride dispatch platform. Three FastAPI services (driver_location, ride_request, dispatch), geohash-partitioned DynamoDB driver positions with TTL expiry, a PostgreSQL trip schema managed by Alembic, and a nearest-driver matcher with atomic claims and an expanding search radius. 67 tests cover the store, the matcher, the trip lifecycle, migrations and a 500 matches per minute throughput floor.