List schema refresh schedules

Example response

{
  "schedules": [
    {
      "connectionId": "550e8400-e29b-41d4-a716-446655440000",
      "createdAt": "2024-01-15T10:30:00Z",
      "description": "Runs daily at 2:00 AM EST",
      "schedule": "0 2 * * ? *",
      "scheduleId": "550e8400-e29b-41d4-a716-446655440001",
      "timezone": "America/New_York",
      "updatedAt": "2024-01-15T10:30:00Z"
    }
  ]
}