v0.4.1

New Features

• Exposed a new helper function, add_input_provenance, to simplify the management of input provenance in test tasks.
• Implemented a new MergedTaskWorker that aggregates results from multiple upstream tasks; it's closely related to JoinedTaskWorker.

Improvements

• Prevent XSS by escaping input provenance in the status dashboard.
• Improved task worker testing helpers with stricter type checks, pre- and post-consume hooks.
• Changed the cache key generation in CachedLLMTaskWorker to use the full prompt rather than the prompt template