Sync ranker: YOE-band concern in reasoning

Show normalized 0-1 scores in demo

Sync ranker (score normalization in combine.py)

Sync ranker: add mild desirability/reliability tiebreaker

Upgrade Space to gradio 5.49.1 (fixes schema/launch bugs); bind 0.0.0.0:7860

Pin huggingface_hub==0.25.2 (gradio 4.44 needs HfFolder)

Fix build: drop pandas, pin Python 3.11, list-based Dataframe

Deploy Redrob ranker Gradio demo (app + ranker + sample + artifacts)

initial commit