feat(appointment): include doctor specialties and clinic address in toArray

The appointment detail view needs the doctor's specialty and the clinic
address/phone/map, which toArray didn't return. Add doctor.specialties[] and
a top-level `address` (the doctor's first address via DoctorAddress::toArray —
address, telephone, map). Additive only; existing keys unchanged. Docs updated.

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

docs/api/appointment.md

@@ -216,24 +216,32 @@ Get appointment detail.
     "uuid": "appt-uuid-...",
     "doctor": {
       "uuid": "...",
-      "title": "دکتر علی احمدی",
-      "image": "https://..."
+      "name": "دکتر علی احمدی",
+      "specialties": [
+        { "uuid": "...", "name": "اورولوژی عمومی" }
+      ]
     },
-    "user": {
+    "address": {
       "uuid": "...",
-      "real_name": "کاربر",
-      "mobile_number": "09..."
+      "name": "مطب دکتر علی احمدی",
+      "address": "یزد، خیابان ...",
+      "telephone": "035...",
+      "map": { "latitude": "31.8", "longitude": "54.3" },
+      "city": { "id": "132", "name": "یزد" },
+      "province": { "id": "100", "name": "یزد" }
     },
+    "user": { "uuid": "...", "mobile": "09..." },
     "slot_start": 1718438400,
     "slot_end": 1718439600,
     "status": "confirmed",
     "note": "...",
-    "price": 500000,
-    "payment_uuid": "pay-uuid-...",
+    "patient_name": "...",
+    "patient_mobile": "...",
     "created_at": 1717000000
   }
 }
 ```
+> `doctor.specialties` آرایه (ممکن است خالی)؛ `address` اولین آدرس پزشک است (ممکن است `null` اگر پزشک آدرسی ندارد). `address.map.latitude/longitude` رشته یا `null`. تاریخ‌ها Unix.
 
 ### Errors
 | Code | HTTP | Description |