Update complete agent with all components

Updates a complete agent configuration in a single atomic operation, including:

• Bot tools configuration and setup
• Document management and knowledge base setup
• Flow metadata and settings
• Front rail node configuration (input validation and filtering)
• Agent node configuration (main processing logic with LLM and tools)
• Back rail node configuration (output validation and filtering)

This endpoint provides a streamlined way to update a full workflow without requiring
separate API calls to update individual components. The entire agent is updated
atomically, ensuring consistency and reducing the complexity of agent updates.

Use this endpoint when you want to update a complete, production-ready agent in
a single operation. For more granular control or when working with existing
components, use the standard agent update endpoint instead.