fix: store appointment address from schedule and auto-add patient to clinic

Appointments now persist address_id resolved from the weekly-schedule
session (location_id) across all booking paths (online, secretary, admin).
On confirm, the patient is added to the clinic owning that address, or to
the doctor's single clinic as fallback. Weekly-schedule create/update now
requires location_id on every active session. PatientSession exposes
doctor_uuid/doctor_name so clinic records show which doctor each visit is for.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Appointment/Service/SlotCalculatorService.php

@@ -33,6 +33,24 @@ class SlotCalculatorService
         return $this->filterBookedSlots($doctor, $flat);
     }
 
+    /**
+     * آدرس (location_id) متناظر با اسلاتِ شروع‌شده در تاریخ مشخص. اگر پیدا نشد null.
+     */
+    public function resolveSlotLocationId(Doctor $doctor, int $slotStart): ?int
+    {
+        $date     = date('Y-m-d', $slotStart);
+        $sessions = $this->buildAllSessions($doctor, $date);
+        foreach ($sessions as $session) {
+            foreach (($session['slots'] ?? []) as $slot) {
+                if ((int) ($slot['start'] ?? 0) === $slotStart) {
+                    $loc = $slot['location_id'] ?? null;
+                    return $loc !== null ? (int) $loc : null;
+                }
+            }
+        }
+        return null;
+    }
+
     /**
      * Returns sessions grouped by shift, each slot tagged with is_available.
      * Used by the schedule view to show real shift boundaries.