prune intermediate checkpoint-200 (keeping only final checkpoint)

Delete checkpoint-800

Delete checkpoint-1200

Delete checkpoint-1000

Delete checkpoint-600

Delete checkpoint-1400

Delete checkpoint-1600

Delete checkpoint-400

Add processor_config.json from base gemma-3-12b-pt for vLLM compatibility

Add preprocessor_config.json from base gemma-3-12b-pt for vLLM compatibility

upload simnpo_gemma-3-12b-pt_20260427_203900

initial commit