post:
  operationId: listStationCities
  summary: List cities for a state
  description: |
    Returns the list of cities for a given state, used by the City
    dropdown in the Create Station form.
  tags: [masterData]
  requestBody:
    required: true
    content:
      application/json:
        schema:
          $ref: "../../components.yaml#/components/schemas/ListStationCitiesRequest"
        example:
          state_id: "MX-JAL"
  responses:
    "200":
      description: Cities returned directly.
      content:
        application/json:
          schema:
            $ref: "../../components.yaml#/components/schemas/ListStationCitiesResponse"
          example:
            items:
              - city_id: "MX-JAL-GDL"
                city_name: "Guadalajara"
              - city_id: "MX-JAL-ZAP"
                city_name: "Zapopan"
    "400":
      $ref: "../../components.yaml#/components/responses/Failure"