Patch Fixes

• Fix logging error in SKChatCompletionAdapter https://github.com/microsoft/autogen/pull/5893
• Fix missing system message in the model client call during reflect step when reflect_on_tool_use=True https://github.com/microsoft/autogen/pull/5926 (Bug introduced in v0.4.8)
• Fixing listing directory error in FileSurfer https://github.com/microsoft/autogen/pull/5938

Security Fixes

• Use SecretStr type for model clients' API key. This will ensure the secret is not exported when calling model_client.dump_component().model_dump_json(). #5939 and #5947. This will affect OpenAIChatCompletionClient and AzureOpenAIChatCompletionClient, and AnthropicChatCompletionClient -- the API keys will no longer be exported when you serialize the model clients. It is recommended to use environment-based or token-based authentication rather than passing the API keys around as data in configs.

Full Changelog: https://github.com/microsoft/autogen/compare/python-v0.4.9...python-v0.4.9.2