Vault check

1. Run obsidian-vault-check; add --orphans when I ask about unlinked notes. If Obsidian is running, obsidian-cli vault=notes unresolved verbose cross-checks the links.
2. Sort the problems into:
   • mechanical: key order, date format, Templater leftovers, a broken link with an obvious target (a renamed note, a typo), a missing created recoverable from git history or a date in the note;
   • judgment: an unknown area, which project, a missing status, anything else.
3. List each problem with the fix you'd make, marking judgment calls as questions, and wait for my go.
4. Apply the approved fixes, rerun until it's clean apart from what I chose to leave, and finish with git diff --stat.