import data from object store

Example request

{
  "commit": {
    "message": "Importing collections from S3"
  },
  "paths": [
    {
      "path": "s3://my-bucket/production/collections/",
      "destination": "collections/",
      "type": "common_prefix"
    },
    {
      "path": "s3://my-bucket/production/collections/file1",
      "destination": "collections/file1",
      "type": "object"
    }
  ]
}