updates cpp cuda plugin ep to leverage CDN binaries similar to webgpu plugin ep

sdk_v2/cpp/src/catalog/static_catalog_client.cc

@@ -51,6 +51,14 @@ class StaticCatalogClient : public ICatalogClient {
     for (const auto& [device, eps] : devices_to_eps) {
       for (const auto& ep : eps) {
         allowed.emplace(to_lower(device), to_lower(ep));
+
+        // CudaPluginExecutionProvider is the ORT registration name for the
+        // downloadable CUDA plugin EP, but catalog models are tagged with
+        // CUDAExecutionProvider. Add the canonical name as an alias so
+        // plugin-EP machines can see and load CUDA catalog models.
+        if (to_lower(ep) == "cudapluginexecutionprovider") {
+          allowed.emplace(to_lower(device), "cudaexecutionprovider");
+        }
       }
     }