fix: Run C headline average is 44.63, not 44.64

docs: document e3_full checkpoints; correct instruct base_model lineage

docs: sync card - v4 track, FINDINGS.md, W&B logs

Upload README.md with huggingface_hub

Upload README.md with huggingface_hub

Upload step_22999.pt with huggingface_hub

Update model card: HPC re-run results, full 2x2 ablation, data-fix narrative

add tinylm/data.py

add tinylm/train.py

add tinylm/muon.py

add tinylm/model.py

add tinylm/__init__.py

add generate.py

add README.md

initial commit