feat(extract): capture seat, class, platform, price + event venue contact

Request and map root-level seat/class/platform and a total price/currency into reservation metadata (shown on the card; price reuses the existing label). Read both the root and reservationFor and tolerate common field-name aliases (priceAmount, priceCurrencyISO4217Code, fareClass, ...) since models name these inconsistently. Also capture event/attraction venue telephone + url onto the auto-created place, matching lodging/restaurant.

shared/src/reservation/ki-reservation.schema.ts

@@ -71,6 +71,11 @@ export const KI_RESERVATION_JSON_SCHEMA = {
           reservationFor: { type: 'object', additionalProperties: true },
           pickupLocation: { type: 'object', additionalProperties: true },
           dropoffLocation: { type: 'object', additionalProperties: true },
+          seat: { type: 'string' },
+          class: { type: 'string' },
+          platform: { type: 'string' },
+          price: { type: ['number', 'string'] },
+          priceCurrency: { type: 'string' },
         },
         required: ['@type'],
       },