Tag the 17 open todos with their g15office task IDs, close 7 todos that
are already done or promoted to Phase 16.3, and record the sync rules
and the phase-to-task map in .planning/G15OFFICE.md.
- same-second migrations sort by name and can run out of order
- make:admin-controller output does not boot and names the model after
the controller
- the DO NOT EDIT header on editable files, and commands that cannot reach
the application
