Secretary limit always read the doctor's plan, so a clinic on the
professional plan hit the doctor's free-plan cap of one secretary.
Limit and count are now per environment: clinic env uses the clinic
subscription and counts the clinic's active secretaries, personal env
uses the doctor's own plan. Counting is per person, not per row, so a
secretary linked to several doctors of one clinic counts once, and
re-linking an already-active person never trips the cap.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
