Drops the old 'pip install merlina; from src.artemis_vlm import ...' hack now that the ArtemisVLM model classes live in the dedicated Schneewolf-Labs/Artemis repo. Also drops the explicit model.all_tied_weights_keys = {} workaround — fixed in artemis-vlm v0.1.0 directly. Switches to AutoModelForCausalLM.from_pretrained() now that __init__.py registers with HF AutoConfig/AutoModel.
