fix(ski-routing): no promise in a condition and no await in a loop, ski route type from its schema

ski-areas.service checks the pending load and download against null and
undefined, the area refresh lane recurses instead of awaiting in a loop,
TourSkiRoute is inferred from its schema, the ways answer is read by
complete === false, and /v1/routes no longer needs a truncated field.

server/src/db/json-columns.ts

@@ -23,7 +23,6 @@ import {
   type PaddleLock,
   type PaddleRegionBoundary,
   type PaddleRegionGraphStats,
-  type SkiRouteOptions,
   type TourChange,
   type TourFixedLeg,
   type TourSourceHintChange,
@@ -194,20 +193,19 @@ export const TOUR_HIKING_PREFERENCES: JsonColumn<HikingPreferences | null> = {
   fallback: () => null,
 };
 
-/** What a ski tour's legs were planned with: the piste router's options and the piste data build they ran on. */
-export interface TourSkiRoute {
-  options: SkiRouteOptions;
-  build: string | null;
-  /** The legs the piste router planned, by the index of the point each starts at; absent where the save did not say. */
-  planned_legs?: number[];
-}
-
+/**
+ * What a ski tour's legs were planned with: the piste router's options and the
+ * piste data build they ran on. planned_legs names the legs the piste router
+ * planned, by the index of the point each starts at; absent where the save did not say.
+ */
 const tourSkiRouteSchema = z.object({
   options: skiRouteOptionsSchema,
   build: z.string().nullable(),
   planned_legs: skiPlannedLegsSchema.optional(),
 });
 
+export type TourSkiRoute = z.infer<typeof tourSkiRouteSchema>;
+
 /** A ski tour's piste router options. A broken row reads as none, and the planner offers the defaults. */
 export const TOUR_SKI_ROUTE: JsonColumn<TourSkiRoute | null> = {
   column: 'tours.ski_options',