Module vehicle 

Structs

CameraTimeWindowKey

Groups passages by camera identifier and a fixed-width time window.

GeoGridKey

Groups records by rounding geographic coordinates to a fixed grid cell.

LicensePlateNormKey

Normalizes a license plate (strips hyphens/spaces, uppercases) and emits the result as a single exact blocking key.

PlateOCRFuzzyKey

Emits the normalized plate plus a deletion-neighbourhood key for each character position.