Revert to original task names — remove paraphrased variants

Fix: update task_index in parquet files to match paraphrased task mappings

Update: 201 episodes, 10 objects, 22 task phrasings with paraphrased variants for language robustness

Update dataset: 100 -> 150 episodes (50 new episodes, 5 tasks, 41900 total frames)

Update SO-100 pick and place dataset (100 episodes, 3 cameras, LeRobot v2.1)

SO-100 pick and place dataset (49 episodes, 3 cameras, LeRobot v2.1)