Pin huggingface_hub to a version compatible with gradio 4.36.0 oauth

Fix gradio version conflict; rely on audioop-lts instead of runtime.txt

Fix gradio version conflict; rely on audioop-lts instead of runtime.txt

Add audioop-lts backport to fix ModuleNotFoundError on Python 3.13

Pin Python 3.11 to fix audioop/pydub import error on 3.13

Add real LangChain4j PR #5619 reference

Initial AgentGuard Bench: pattern vs. model guardrail comparison

initial commit