Add the missing workflow validation example and keep the #1039 TDD regression active by removing the expected-fail tag and updating scenario narrative.\n\nTo satisfy the required full quality gates, stabilize flaky integration behavior encountered during this issue run: use a shared SQLAlchemy session in resource DAG scripts, isolate RxPY validation temp paths per test run, extend transient subprocess timeouts/retry behavior, and clear stale pabot worker artifacts before integration runs so repeated nox executions are reliable.\n\nISSUES CLOSED: #1039
brent.edwards
Jeff