Sort ready queue by priority

The dashboard 'Ready Queue' and 'jr task ready' show different sort orders.

The Ready Queue on the dashboard does not put highest priority items at the top.

Fix:

• getReadyTasks should return tasks sorted by priority (P0 first, then P1, etc.)
• Or the Web UI should sort by priority when displaying
• Ensure CLI 'jr task ready' also shows priority-sorted order

High priority items should always be at the top of the ready queue.