feat(spec): ExecutionStepMetrics gains an optional failures slot; FlowRunSummary.failed is declared as the fold INCLUDING what a delegating node rolled up from its child (#15617, spec half)
#32288
| Job | Run time |
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| 24m 9s | |
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| 11m 3s | |
| 2m 50s | |
| 11m 22s | |
| 3s | |
| 58m 44s |