feat(appointment): expose weekly opening hours per booking location

The booking-locations endpoint described where a doctor can be booked but not
when, so the public site had no way to emit openingHoursSpecification and had
to fall back to availableService alone.

Each location now carries opening_hours: its active weekly shifts flattened,
with the English weekday name so the consumer can map it onto schema.org
directly. A day with two shifts appears twice; days with no active shift are
omitted. Hours are per context, so the personal practice and each clinic report
their own.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Appointment/Controller/AppointmentController.php

@@ -288,6 +288,7 @@ class AppointmentController extends BaseController
                 'clinic_uuid'       => $clinic?->getUuid(),
                 'booking_mode'      => $meta['booking_mode'],
                 'buffer_minutes'    => (int) $meta['buffer_minutes'],
+                'opening_hours'     => $this->openingHours($schedule),
                 'services'          => $meta['booking_mode'] === WeeklySchedule::MODE_SERVICE
                     ? $this->bookableServices($doctor, $clinic)
                     : [],
@@ -718,6 +719,44 @@ class AppointmentController extends BaseController
         }, $this->itemRepo->findBookableByEntity($type, $id));
     }
 
+    /**
+     * شیفت‌های فعال هفته به‌صورت تخت، با نام انگلیسی روز — آمادهٔ نگاشت به
+     * openingHoursSpecification در schema.org. کلیدهای برنامه 0..6 هستند و 0 شنبه است.
+     *
+     * @return array<int, array{day: string, opens: string, closes: string}>
+     */
+    private function openingHours(WeeklySchedule $schedule): array
+    {
+        $hours = [];
+
+        foreach ($schedule->getDaySchedule() as $dayIndex => $day) {
+            $dayName = WeeklySchedule::DAYS[(int) $dayIndex] ?? null;
+            if ($dayName === null) {
+                continue;
+            }
+
+            foreach (($day['sessions'] ?? []) as $session) {
+                if (!($session['active'] ?? false)) {
+                    continue;
+                }
+
+                $opens  = $session['start_time'] ?? null;
+                $closes = $session['end_time'] ?? null;
+                if ($opens === null || $closes === null) {
+                    continue;
+                }
+
+                $hours[] = [
+                    'day'    => ucfirst($dayName),
+                    'opens'  => $opens,
+                    'closes' => $closes,
+                ];
+            }
+        }
+
+        return $hours;
+    }
+
     /** زودترین اسلات آزاد در ۳۰ روز آینده، یا null اگر ظرفیتی نباشد. */
     private function nextAvailableAt(Doctor $doctor, ?Clinic $clinic): ?int
     {