timeout error now with text

[daanelson]

Looks like there are two places where predictions can time out in safe push, one of which had no error text. Adding some so that it's easier for for folks to piece out why their safe push fails in the future.

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Important

Add descriptive text to PredictionTimeoutError in predict() to include timeout duration and prediction index.

• Error Handling:
  • In predict() function in predict.py, added descriptive text to PredictionTimeoutError to include the timeout duration and prediction index (if available).

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