Deploy Gradio app to HF Spaces

Add CI, typed ORM models, and packaging cleanup

Restructure to api/src and add Streamlit UI

Restructure project layout, modernize stack, and clean up deprecated code

chore: Address security vulnerabilities and apply best practices

feat: Phase 8 - final evaluation and portfolio polish

feat: Phase 3 - baseline and XLM-R fine-tuning

fix: add IndicSentiment Hindi dataset

feat: Phase 1 - project scaffold and data download

feat: Phase 1 - project scaffold and data download