feat(privacy): keep venue phone numbers out of every public response

A doctor's office number sat next to the address on the public profile and in
the anonymous API payload, so harvesting the phone number of every practice in
the country was one unauthenticated request away. Street address and map
coordinates stay public — a patient needs those to find the place — but the
phone is now opt-in per caller: DoctorAddress::toArray() and the clinic
serializers only emit it when told to, and the public doctor/clinic endpoints
tell them to only when the caller may edit that profile (the same can_edit they
already compute). Owner-facing address CRUD keeps returning it unchanged.

The patient still gets the number where it is actually useful — their own
appointment. That payload also stops guessing: it used to serialise the
doctor's *first* address, so a booking made at the clinic or at a second office
showed the wrong street entirely. It now resolves the address recorded on the
appointment itself, which works the same for a personal office and a clinic
branch, and falls back to the clinic's own number when the address has none.

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

docs/api/doctor.md

@@ -133,7 +133,7 @@ limited to the whitelist under `PATCH /api/v1/doctor/{uuid}`.
       "address": [],
       "state": [],
       "city": [],
-      "clinics": [{ "uuid": "...", "name": "کلینیک الوند", "address": "...", "telephone": "..." }],
+      "clinics": [{ "uuid": "...", "name": "کلینیک الوند", "address": "...", "telephone": null }],
       "representation": { "id": 12, "uuid": "9c1...", "full_name": "علی محمدی" }
     }
   }
@@ -143,6 +143,13 @@ limited to the whitelist under `PATCH /api/v1/doctor/{uuid}`.
 > ⚠️ **Double-nested:** Frontend extracts with `data?.data?.data`
 >
 > ℹ️ `representation` نماینده‌ی مالکِ پزشک است؛ برای پزشکِ بدون نماینده `null`.
+>
+> 🔒 **Phone numbers are not public.** `address[].telephone` and `clinics[].telephone`
+> are `null` for anonymous callers and only carry a value when `can_edit` is `true`
+> (the profile owner, its representative, or an admin). Street address and map
+> coordinates stay public — a patient needs them to find the place. The venue phone
+> reaches the patient through their own appointment (`GET /api/v1/appointments/user`),
+> not through the public profile.
 
 ### Errors
 | Code | HTTP | Description |
@@ -171,7 +178,7 @@ Get doctor detail for clinic owner — only doctors who are members of the authe
       "uuid": "...",
       "title": "علی احمدی",
       "specialties": [...],
-      "clinics": [{ "uuid": "...", "name": "کلینیک نور", "address": "...", "telephone": "..." }]
+      "clinics": [{ "uuid": "...", "name": "کلینیک نور", "address": "...", "telephone": "021..." }]
     }
   }
 }