DRAFT: with items persistent storage and speed improvements

[guzzijones]

Testing out persistent storage for faster with items.

1. When creating task executions for itemized tasks separate state records for each item
2. Task execution records now contain minimal metadata rather than full context for all items
3. Individual item states are updated independently, avoiding the need to load/modify the entire context
4. Results are aggregated only when needed (when determining final task status)