Upload tokenization_plasmid_lm.py with huggingface_hub

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Fix RoPE buffers zeroed by fast-init: recompute in _init_weights

Fix tokenizer: remove special token ID property overrides for transformers>=5.x compat

Fix _tied_weights_keys for transformers>=4.58 compatibility (dict, not list)

Add tokenizer_config.json for AutoTokenizer compatibility

Upload PlasmidLM pretrained checkpoint (v4, step 15000)

initial commit