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>

src/Appointment/Entity/Appointment.php

@@ -153,12 +153,19 @@ class Appointment
 
     public function toArray(): array
     {
+        $firstAddress = $this->doctor->getAddresses()->first() ?: null;
+
         return [
             'uuid'       => $this->uuid,
             'doctor'     => [
-                'uuid' => $this->doctor->getUuid(),
-                'name' => $this->doctor->getName(),
+                'uuid'        => $this->doctor->getUuid(),
+                'name'        => $this->doctor->getName(),
+                'specialties' => array_map(
+                    fn($s) => ['uuid' => $s->getUuid(), 'name' => $s->getName()],
+                    $this->doctor->getSpecialties()->toArray()
+                ),
             ],
+            'address'    => $firstAddress?->toArray(),
             'user'       => [
                 'uuid'   => $this->user->getUuid(),
                 'mobile' => $this->user->getMobileNumber(),