Ensure tasks in DAG scope can run after setup even when a dependent TG has an unfinished setup

This issue has no description.

The issue names DAG scope, tasks, setup, and dependent task groups but provides no files, tests, or reproduction steps. Start by locating the scheduler logic that handles task-group setup dependencies and DAG-scope task readiness. Done means the affected tasks can run after their own setup even when a dependent task group still has unfinished setup, with regression coverage for that case.

Written by the indexing model from the issue text.