Added health metrics for application load and database load (#2257)

* Added health metrics for application load

* Added health metrics for application load

* Fix unit tests

* Added more metrics

* Added few comments

* Added DatabaseLoad Scenario and address comments

* Fix unit tests

* fix unit tests

* Fix unit tests

* fix unit tests

* fix the mock

* Fix unit tests

src/Utils/FetchWithTimeout.ts

@@ -0,0 +1,37 @@
+/**
+ * Perform a fetch with an AbortController-based timeout. Returns the Response or throws (including AbortError on timeout).
+ *
+ * Usage: await fetchWithTimeout(url, { method: 'GET', headers: {...} }, 10000);
+ *
+ * A shared helper to remove duplicated inline implementations across the codebase.
+ */
+export async function fetchWithTimeout(
+  url: string,
+  init: RequestInit = {},
+  timeoutMs: number = 5000,
+): Promise<Response> {
+  const controller = new AbortController();
+  const id = setTimeout(() => controller.abort(), timeoutMs);
+  try {
+    const response = await fetch(url, { ...init, signal: controller.signal });
+    return response;
+  } finally {
+    clearTimeout(id);
+  }
+}
+
+/**
+ * Convenience wrapper that returns null instead of throwing on timeout / network error.
+ * Useful for feature probing scenarios where failure should be treated as absence.
+ */
+export async function tryFetchWithTimeout(
+  url: string,
+  init: RequestInit = {},
+  timeoutMs: number = 5000,
+): Promise<Response | null> {
+  try {
+    return await fetchWithTimeout(url, init, timeoutMs);
+  } catch {
+    return null;
+  }
+}