Replace `vehicle: any` in the route + every helper (getVehicleAttributes,
fromPcat, fromEmex, fromVinApi, getFallbackAttributes, getDisplayAttributes,
getEngineCode, getEquipment, VehicleSummary, VehicleAttributes,
VehicleEquipment) with the shared Vehicle type, and type the two queries
as Vehicle / CategoryNode[]. The opaque rawData blob now goes through a
small RawData interface that captures the four source-specific shapes
(pl24, parts-catalogs, emex, vin-api) instead of `any` index access, so
the per-source helpers stay readable.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>