fix(javascript): report EventSource and sendBeacon URLs as network endpoints (#3044)

Co-authored-by: xpeng5278-web <330743750+xpeng5278-web@users.noreply.github.com>

src/domain/javascript/javascriptStaticAnalysis.send_beacon.test.ts

@@ -0,0 +1,34 @@
+import { describe, expect, it } from "vitest";
+
+import { analyzeJavaScriptStaticSource } from "./javascriptStaticAnalysis.js";
+
+const endpoints = (source: string) =>
+  analyzeJavaScriptStaticSource(source).endpoints.map(
+    ({ kind, value, mechanism }) => ({ kind, value, mechanism }),
+  );
+
+describe("beacon endpoints", () => {
+  it("reports navigator.sendBeacon URLs", () => {
+    expect(
+      endpoints(`
+        navigator.sendBeacon("/api/telemetry", payload);
+        window.navigator.sendBeacon("https://metrics.example/collect");
+      `),
+    ).toEqual([
+      {
+        kind: "network",
+        value: "/api/telemetry",
+        mechanism: "call:navigator.sendBeacon",
+      },
+      {
+        kind: "network",
+        value: "https://metrics.example/collect",
+        mechanism: "call:window.navigator.sendBeacon",
+      },
+    ]);
+  });
+
+  it("keeps a dynamic beacon URL unreported", () => {
+    expect(endpoints("navigator.sendBeacon(url, payload);")).toEqual([]);
+  });
+});