Comprehensive README: architecture docs, implementation details, known issues

Fix: remove sdk_version pin, pin jinja2, simplify launch for HF Spaces

Pin gradio<5 and huggingface_hub<1 for compatibility

Pin Python 3.10 to fix pydub compatibility

Add YAML metadata for HF Space config

Add Ouroboros dual T5 demo: protein-text bidirectional generation

initial commit