Add example to openapi schema

Author: nelsonkopliku

lib/trento_web/openapi/v1/schema/user.ex

@@ -21,7 +21,7 @@ defmodule TrentoWeb.OpenApi.V1.Schema.User do
           provider: %Schema{
             type: :string,
             description: "Chosen AI provider.",
-            example: "Google Gemini",
+            example: "googleai",
             nullable: false
           },
           model: %Schema{
@@ -31,6 +31,10 @@ defmodule TrentoWeb.OpenApi.V1.Schema.User do
             nullable: false
           }
         },
+        example: %{
+          provider: "googleai",
+          model: "gemini-2.0-flash"
+        },
         required: [:provider, :model]
       },
       struct?: false