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This clears
pytask_meta.annotation_localsafter collection so task functions stay picklable for process-based parallel backends.When tasks must be pickled by value (e.g. loop-generated tasks), cloudpickle serializes the function dict, which currently includes the decoration-time locals snapshot. That snapshot can reference non-picklable objects (for example locks), causing TypeError: cannot pickle '_thread.RLock' object.
Changes: