Bucket lifecycle policy reference

The supported lifecycle transitions:

{
  "transitions": [
    { "from": "STANDARD", "to": "INFREQUENT", "after_days": 30 },
    { "from": "INFREQUENT", "to": "ARCHIVE",   "after_days": 90 },
    { "from": "ARCHIVE",   "to": "DEEP",       "after_days": 365 }
  ]
}

Apply the policy with PUT /v1/buckets/{bucket}/lifecycle.