Scheduler Event Timeline Resources

Assign events to nested resource lanes on SchedulerTimeline.

ScheduleResource supports hierarchical children — each row renders as an indented lane label.

• Team, room, or equipment hierarchies where events belong to a specific row
• Gantt views where every bar must map to a resource id

• Bind resources: RwSignal<Vec<ScheduleResource>> — required on timeline (unlike calendar).
• Nest sub-resources via children on each ScheduleResource.
• Set PlannedEvent.resource_id to the target resource id.