Add 'openstatus incident postmortem' (alias pm) with show, edit and approve. show pages the body with its review status in a terminal and prints the raw markdown when piped, so show and edit round-trip through a file. edit takes --file (or - for stdin) or --content; approve can also close the incident. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>