Project: datamanagement
Issue DM-6303: Wrap ndarray with pybind11
Note particularly Jim's second bullet point at https://jira.lsstcorp.org/browse/RFC-182?focusedCommentId=48644&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-48644.
Story points: 12