---
features:
  - |
    Added warm_up() method to all ChatGenerator components (OpenAIChatGenerator,
    AzureOpenAIChatGenerator, HuggingFaceAPIChatGenerator, HuggingFaceLocalChatGenerator,
    and FallbackChatGenerator) to properly initialize tools that require warm-up before
    pipeline execution. The warm_up() method is idempotent and follows the same pattern
    used in Agent and ToolInvoker components. This enables proper tool initialization
    in pipelines that use ChatGenerators with tools but without an Agent component.
