Pin starlette<0.40 and fastapi<0.115 to keep gradio 4.44 TemplateResponse positional-args compat

Revert gradio to 4.44.0 to match HF Space sdk_version (avoids dep resolution conflict)

Pin jinja2<3.1.5 to fix gradio 4.44 unhashable dict TypeError; bump gradio to 4.44.1

Deploy ModelLens v1: BYOK OpenAI key, size filter, official-only filter, 47k HF model pool