feat: add response guidelines and guardrails field (#11911)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

enterprise/app/views/api/v1/models/captain/_assistant.json.jbuilder

@@ -2,6 +2,8 @@ json.account_id resource.account_id
 json.config resource.config
 json.created_at resource.created_at.to_i
 json.description resource.description
+json.guardrails resource.guardrails
 json.id resource.id
 json.name resource.name
+json.response_guidelines resource.response_guidelines
 json.updated_at resource.updated_at.to_i