feat(stats): add Paths and Hashes analytics (#57)

tests/api/analytics-client.test.ts

@@ -1,8 +1,19 @@
 import { afterEach, expect, it, vi } from "vitest";
-import { getStatsObservations, getStatsScopes, getSignalStats } from "../../src/api/client";
+import { getStatsObservations, getStatsScopes, getSignalStats, getPathStats } from "../../src/api/client";
 
 afterEach(() => vi.unstubAllGlobals());
 
+it("sends path window bounds, regional filters and cancellation", async () => {
+  const fetcher = vi.fn<typeof fetch>(async () => ({ ok: true, json: async () => ({}) }) as Response);
+  vi.stubGlobal("fetch", fetcher);
+  const controller = new AbortController();
+  await getPathStats(0, 1000, ["YVR", "YYJ"], controller.signal);
+  const url = new URL(fetcher.mock.calls[0]![0] as string);
+  expect(url.pathname).toContain("/stats/paths");
+  expect(Object.fromEntries(url.searchParams)).toEqual({ since: "0", until: "1000", iatas: "YVR,YYJ" });
+  expect(fetcher.mock.calls[0]![1]).toEqual({ signal: controller.signal });
+});
+
 it("forwards region and cancellation to both aggregate endpoints, omitting an empty global filter", async () => {
   const fetcher = vi.fn<typeof fetch>(async () => ({ ok: true, json: async () => [] }) as Response);
   vi.stubGlobal("fetch", fetcher);