Pin litellm/openai/python-dotenv to versions known to work locally

Bump Gradio to 6.x for current stable and resolved aiofiles pin

Bump Gradio to 6.x for current stable and resolved aiofiles pin

Bump Gradio to 5.x to resolve aiofiles conflict with crewai

README: project description, architecture, design notes, known limitations

Add Python-side cardinality validator with re-invoke for missing gaps

SkillBridge MVP: end-to-end flow working locally