Documentation: Jira migration cleanup

Umbrella / parent issue for closing out the documentation backlog that was migrated from Jira (carrying the `from-jira` label). Repo-scoped workstream tracked here in `documentation`.

**Goal:** triage, write, and close each migrated item so the `from-jira` backlog is fully resolved and the provenance label can eventually be retired.

Sub-issues are attached below.

Start with the attached sub-issues and the documentation items carrying the `from-jira` label. Triage each migrated item, complete or close it as appropriate, and confirm the backlog is fully resolved so the provenance label can eventually be retired.

Written by the indexing model from the issue text.