perf(reports): read every resource's calendar in one batch, and close the owed tests

Writing the query-count test that task 14 owed showed the growth was real: one
resource cost 10 queries, six cost 33 — about five per resource, because the
available-minutes figure walked each resource's calendar on its own.

Holidays, tenant overrides and branch hours are identical for every resource in
a report, so they now load once outside the loop; shifts and exceptions load for
all resources in one query each. The batched path is a new method rather than a
change to rawAvailability, which the booking engine also calls. The test pins
the shape of the growth, not an exact count.

Also landed:

- app:segment:seed-templates with beauty, dental and physio presets. Building
  four segments and their requirements by hand is the first thing a new clinic
  must do and the most tedious; this gives them something to edit instead of an
  empty page. It refuses to touch a service that already has segments unless
  --force, and it will not invent resource types the tenant never defined.
- book-all is all-or-nothing, proven rather than asserted: with a calendar open
  one day a week and a 1-2 day protocol gap, session one finds a slot and
  session two cannot, and every session must come back planned.
- credit_refundable: false takes the credit back with a negative adjustment and
  deletes nothing — the ledger stays append-only.
- the segments editor has frontend tests, including that it sends back what the
  user sees and renders read-only without the permission.

useBranches now returns [] for a non-array payload instead of throwing
"branches.map is not a function" and taking the page down with it.

BookingLocationsScanTest built a Clinic around a Doctor loaded from a different
manager, which Doctrine treats as a new entity; it flushed fine most runs and
failed on cascade in others. It now loads the doctor from the same manager.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docs/api/reports.md

@@ -145,3 +145,14 @@
 ```bash
 ddev exec php bin/phpunit tests/Report   # ۱۶ تست
 ```
+
+## هزینهٔ کوئری
+
+`occupied` و `active` هرکدام یک کوئری `GROUP BY` اند، و تقویم همهٔ منابع هم دسته‌ای خوانده
+می‌شود (`ResourceAvailabilityService::rawAvailabilityForAll`): تعطیلات و استثناهای محیط و
+ساعت شعبه برای همهٔ منابع یکی‌اند و بیرون حلقه می‌آیند، شیفت و استثنای هر منبع هم با یک
+کوئری برای همه.
+
+پیش از این هر منبع پنج کوئری اضافه می‌آورد و گزارشِ یک کلینیک چهل‌منبعی دویست کوئری
+می‌شد. تست `testQueryCountDoesNotGrowWithTheNumberOfResources` همین را نگه می‌دارد —
+عددِ دقیق را پین نمی‌کند، فقط رشدِ خطی را رد می‌کند.