Task ID missing from Batch JSON file in latest version

[tomflexcompute]

In previous versions (e.g., 2.6.3), the JSON file generated from a Batch object contained the task_id information. However, in the latest version, this information is no longer present in the JSON file.

Steps to Reproduce:
Generate a Batch object and save it to a JSON file using b.to_json("fas.json").
Open the saved JSON file and look for task_id information.
Load the JSON file back using Batch.from_json("fas.json") and access the task_id via j.jobs["a"].task_id.

Observed Behavior:
The task_id is not present in the JSON file.
When the JSON file is loaded back, a task_id can be accessed, but it appears to be different from the original task_id.

Expected Behavior:
The task_id should be included in the JSON file for consistency and usability.