Update SKILL.md with DataLoader batch size mismatch bug and shared state pitfall

--train-iters now also overrides time_predictor.num_iterations

Fix DataLoader batch size mismatch across training phases + --train-iters now overrides all phases

Add pool.finalize() call after building trajectory pool for O(1) sampling

Fix geomloss tensor shape bug for images + optimize pool sampling

Add SKILL.md — paper reproduction skill with lessons from NSGF++ implementation

Create skill-creator.md

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initial commit