Fix: force unbuffered stdout for Kaggle notebook output + use print() with flush"

Add --log_batch_every: prints loss every N batches within an epoch"

Add --num_gpus: splits tasks across GPUs in parallel processes"

Add --log_every arg to control epoch print frequency (default 100)

Replace train_task.py with full batch runner: loops all 400 tasks, skips solved, logs everything, uses manual ONNX builder

Add TRM-Nano per-task training script with augmentation and ONNX export