Add axios request queue interceptor with unit tests:

- Introduce `installAxiosRequestQueue` to manage and queue requests globally.
- Update `main.js` to install the interceptor at app initialization.
- Add `__skipRequestQueue` configuration in `authenticatedRequest` for bypassing the queue.
- Create unit tests to validate queue behavior and ensure request sequencing.

src/services/installAxiosRequestQueue.js

@@ -0,0 +1,34 @@
+import axios from "axios";
+import { enqueueRequest } from "@/services/requestQueue.js";
+
+let requestInterceptorId = null;
+
+const isQueueBypassed = (config) => config?.__skipRequestQueue === true;
+
+export const installAxiosRequestQueue = () => {
+  if (!axios?.interceptors?.request) {
+    return;
+  }
+
+  if (requestInterceptorId !== null) {
+    return;
+  }
+
+  requestInterceptorId = axios.interceptors.request.use((config) => {
+    if (isQueueBypassed(config) || config?.__queueAdapterWrapped) {
+      return config;
+    }
+
+    const resolvedAdapter = axios.getAdapter(config?.adapter ?? axios.defaults.adapter);
+    config.__queueAdapterWrapped = true;
+    config.adapter = (adapterConfig) => enqueueRequest(() => resolvedAdapter(adapterConfig));
+    return config;
+  });
+};
+
+export const __resetAxiosRequestQueueInstallerForTests = () => {
+  if (requestInterceptorId !== null && axios?.interceptors?.request) {
+    axios.interceptors.request.eject(requestInterceptorId);
+  }
+  requestInterceptorId = null;
+};