Ensure that the dbt build root task always runs before watcher/sensor tasks begin consuming XCom events. This guarantees that watcher tasks don’t start waiting on events from an uninitialized run.

Explore the following potential ideas to achieve this:

1. Airflow priority weight is set on the build task.
2. Trigger rules (always?) configured to enforce execution order.

related: #1950

Acceptance Criteria:

• The root dbt build task always runs before sensor tasks