# `Cyclium.Migrations.V11`
[🔗](https://github.com/Cyclium/cyclium_ex/blob/main/lib/cyclium/migrations/v11.ex#L1)

V11: Episode timestamp precision and workflow ordering.

- Promotes `started_at` and `finished_at` from second-precision
  (:utc_datetime) to microsecond-precision (:utc_datetime_usec) so that
  sequential episodes naturally sort correctly without tiebreakers.
- Promotes `queued_at` to :utc_datetime_usec for the same reason.
- Adds `workflow_step_no` — the topological depth of the episode's step in
  the workflow DAG (root steps = 0, each dependent layer +1). Used as a
  stable tiebreaker for truly parallel steps that fire at the same instant.

# `down`

# `up`

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*Consult [api-reference.md](api-reference.md) for complete listing*