Explain the purpose of Azure Durable Functions for building stateful serverless workflows. The purpose of Azure Durable Functions is to enable the creation of stateful serverless workflows in a simple and reliable manner. Traditional serverless functions are stateless, meaning they don't maintain any memory of past executions or interactions. However, many real-world scenarios require maintaining state across multiple function calls, especially in long-running workflows and complex business processes. This is where Azure Durable Functions come into play. Azure Durable Functions allow developers to build workflows that span multiple function executions and maintain state throughout the entire process. They provide a framework for creating and managing durable tasks that preserve the state of each step in the workflow. This stateful behavior is crucial for orchestrating and coordinating various actions, approvals, and decisions in a structured and reliable manner.