Nomad changes

fixtures/plugin_api/validators_list.json

@@ -0,0 +1,12 @@
+{
+  "id": "validators_list",
+  "category": "validator_management",
+  "description": "List all registered validators",
+  "tags": ["validators", "plugin_management", "list"],
+  "call": "list_validators",
+  "assertions": [
+    {
+      "type": "not_error"
+    }
+  ]
+}