Loops/iteration in steps — Canonical v10

Canonical v10 expresses iteration as a step modifier, not a step type:

• step.loop defines fan-out (in + iterator + loop.spec)
• iteration-local state lives under iter.*
• streaming/pagination uses task policy (do: jump / do: break)

See also

• Loop iteration guide: documentation/docs/reference/iterator_v3.md
• Pagination pattern: documentation/docs/reference/pagination_v2.md
• Step spec: documentation/docs/reference/dsl/step_spec.md