Custom Model Training

Trains a custom Ideogram model on a folder of reference images, then generates a new image with that trained model to prove it works — a real end-to-end pipeline (create_dataset, upload_dataset_assets, train_model, poll get_model, generate_image with custom_model_uri), not just an explanation of how training works. Use whenever the user wants to "train a custom model," "fine-tune" on their own images, get "consistent" output of a specific character, product, or brand across many future generations, lock in a look so it doesn't drift between generations, or turns a set of reference images (including a previously generated brand-identity-sheet or character-model-sheet) into…