fix(tours): fit the merged tracks together after integration

Types, test expectations and helpers the seven tracks each changed on their
own, brought in line with the integrated code. tours.service.ts and the tours
repository grew past the size limit with every track and hand their row and
write helpers to modules of their own.

shared/src/tours/tour-stages.spec.ts

@@ -19,8 +19,15 @@ import { describe, expect, it } from 'vitest';
 
 type Role = 'start' | 'via' | 'end';
 
+/** What a test sets on a point beyond its place and role. */
+interface PointExtra {
+  stage_end?: boolean;
+  shaping?: boolean;
+  key?: string;
+}
+
 /** A straight run of points along a meridian, each a stop unless told otherwise. */
-function points(count: number, extra: (index: number) => Record<string, unknown> = () => ({})) {
+function points(count: number, extra: (index: number) => PointExtra = () => ({})) {
   return Array.from({ length: count }, (_, sequence) => ({
     lat: 47 + sequence * 0.01,
     lng: 11,