feat: migrate clients module to patients + add docs

app/epd/_archive/clients_backup_20251122/page.tsx

@@ -0,0 +1,10 @@
+import { redirect } from 'next/navigation';
+
+/**
+ * Clients Root Redirect
+ * Redirects /epd/clients to /epd/patients for backward compatibility
+ */
+
+export default function ClientsRedirect() {
+  redirect('/epd/patients');
+}