Fix span merging: group by entity type before merging (pipelines interleave)

Merge sub-word NER fragments into clean whole-word spans

Bump transformers to 4.48.3 for ModernBERT support

Let ZeroGPU manage spaces/gradio; pin only transformers+torch

Fix torch version for ZeroGPU (2.8.0)

aikka OpenMed NER: README, requirements, app.py

initial commit