Improve model card attractiveness: richer tags and usage snippet

Polish model card with usage snippets and richer metadata

Add base_model metadata (bert-lite)

Add dataset metadata to model card

Remove script-centric files from results

Add unified repo card and clean non-artifact files

Upload bert-lite CLS embeddings

Add embedding manifest

Add requirements

Add runbook

Add metrics summary CSV

Add metrics JSON

Add unified repo card

initial commit