Record usernames for manual provisioning requests

src/lib/server/auth/request-context.ts

@@ -0,0 +1,17 @@
+import { AsyncLocalStorage } from 'node:async_hooks';
+
+const requester = new AsyncLocalStorage<{ username: string | null; active: boolean }>();
+
+/** Use only the authenticated session, and stop attribution when the request finishes. */
+export async function withRequestUsername<T>(username: string | null, work: () => T | Promise<T>): Promise<T> {
+    const context = { username, active: true };
+    return requester.run(context, async () => {
+        try { return await work(); }
+        finally { context.active = false; }
+    });
+}
+
+export function currentRequestUsername(): string | null {
+    const context = requester.getStore();
+    return context?.active ? context.username : null;
+}