findByClinicWithFilters left-joined specialties only for filtering, so
toListArray() lazy-loaded them per doctor (N+1). addSelect them and switch the
result fetch to Paginator(fetchJoinCollection: true) so LIMIT still paginates by
doctor.
Test infra: ApiTestCase::countQueries() (via doctrine.debug_data_holder).
Regression: tests/Doctor/ClinicDoctorListNPlusOneTest asserts the query count
does not grow with doctor count (4→10 without the fix).
Also relaxed AppointmentExpiryServiceTest's exact-count assertion (it counts all
stale pendings in the shared db_test, which accumulates) — logged test-isolation
debt as E6.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
