test: add MVP QA gate

src/lib/testing/external-api-mocks.ts

@@ -0,0 +1,33 @@
+import { http, HttpResponse } from "msw";
+
+export const externalApiHandlers = [
+  http.get("https://prometheus.dimensionlab.net/api/v1/query", () =>
+    HttpResponse.json({
+      status: "success",
+      data: {
+        resultType: "vector",
+        result: [
+          {
+            metric: { instance: "fixture" },
+            value: [1771430400, "1"],
+          },
+        ],
+      },
+    }),
+  ),
+  http.get("https://uptime.dimensionlab.net/api/status-page/*", () =>
+    HttpResponse.json({
+      status: "ok",
+      incidents: [],
+      monitors: [{ name: "fixture", status: "up" }],
+    }),
+  ),
+  http.get("https://api.open-meteo.com/v1/forecast", () =>
+    HttpResponse.json({
+      current: {
+        temperature_2m: 21.4,
+        weather_code: 0,
+      },
+    }),
+  ),
+];