refactor(pricing): make the service the only price source

Price lists, annual tariffs and per-branch price overrides each answered
"what does this service cost?" differently, so a single date could carry
several answers and nobody could say which one was right. Price now lives
only on ServiceItem.price_rials, edited from the services page.

- drop PriceList/PriceListItem, their repositories and the seven
  /api/v1/price-list(s) endpoints; PricingController keeps only quote and
  the appointment price snapshot
- drop Tariff, TariffRepository, TariffService and the two
  /service-items/{uuid}/tariffs endpoints; creating or repricing a service
  no longer upserts a current-year tariff
- drop price_rials from ServiceBranchOverride; the entity stays for its
  duration columns, which DurationCalculator and ServiceSelectionValidator
  still read
- InvoiceService reads the item price directly
- PricingEngine collapses to a single source; breakdown.sources always
  reports service_item, keeping the response contract intact
- remove the price-lists admin page, its route and settings-menu entry, the
  tariff modal and the service detail tariffs tab; useAppointmentInvoice
  moves to its own hook file

Migration drops price_lists, price_list_items, service_tariffs and the
override price column.

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

docs/api/secretary.md

@@ -144,7 +144,7 @@ Create a secretary for a doctor.
 | `insurances` | `InsuranceController` (insurance-pricing, tenant-insurances, service-coverage, doctor-insurance) | view/create/update/delete |
 | `inventory` | `InventoryController` (items + packages) | view/create/update/delete |
 | `tags` | `TenantTagController` (لیست با `tags.view` یا `patients.view`؛ نوشتن‌ها با `tags.*`) | view/create/update/delete |
-| `services` | `ClinicServiceController` (sections + items + tariffs). owner از محیطِ فعال با `SecretaryAccessChecker::resolveOwnerEntity` حل می‌شود چون `EntityContextResolver` منشی را نمی‌شناسد. گیتِ `services.*` پیش از گیتِ اشتراک اجرا می‌شود | view/create/update/delete |
+| `services` | `ClinicServiceController` (sections + items). owner از محیطِ فعال با `SecretaryAccessChecker::resolveOwnerEntity` حل می‌شود چون `EntityContextResolver` منشی را نمی‌شناسد. گیتِ `services.*` پیش از گیتِ اشتراک اجرا می‌شود | view/create/update/delete |
 | `staff` | `StaffController` (resolveEntity منشی‌آگاه) | view/create/update/delete |
 | `discounts` | `DiscountController` (CRUD؛ `suggestions` جزو flowِ جلسه است و با discounts گِیت نمی‌شود) | view/create/update/delete |
 | `sms` | `SmsWalletController` (balance/charge/logs/settings). endpointهای admin (قالب/ارسال) همچنان `ROLE_ADMIN` | view/create/update |