Gate analytics and cache public API requests

frontend/app/api/analytics/events/route.ts

@@ -5,8 +5,14 @@ import {
 } from "@/lib/backend-auth";
 
 const API_BASE = process.env.POLYWEATHER_API_BASE_URL;
+const ANALYTICS_ENABLED =
+  process.env.NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS === "true";
 
 export async function POST(req: NextRequest) {
+  if (!ANALYTICS_ENABLED) {
+    return new NextResponse(null, { status: 204 });
+  }
+
   if (!API_BASE) {
     return NextResponse.json(
       { error: "POLYWEATHER_API_BASE_URL is not configured" },