feat(treatment): select treatment behaviour by practice domain, not by if-branch

Everything that differs between specialties as data is already stored as data.
What is left is behaviour — when a case opens, what happens once a session ends —
so it becomes a TreatmentWorkflow resolved through a tagged-service registry.
The booking path calls one collaborator and never names a specialty; adding
dentistry is a new class, not an edit to confirmation.

A clinic that has chosen no practice domain still gets working multi-session
courses: DefaultTreatmentWorkflow answers for null and for any code without a
dedicated implementation, keeping "unset means behave as today, not error".
LaserTreatmentWorkflow is deliberately empty beyond claiming `beauty` — it is the
seam where laser-specific behaviour will land without disturbing anyone else.

Session due dates are anchored to the previous session's actual finish, so a
patient who comes twenty days late shifts the rest of their course instead of
getting the next session while it can still do nothing. Only the next session is
recomputed; later ones keep their estimate because they are anchored to nothing
yet.

Attachment targets the first session without an appointment rather than the
first open one: a patient booking again mid-course was otherwise matched to the
session that already had a booking, and the second appointment went nowhere.

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

src/PracticeDomain/Controller/PracticeDomainController.php

@@ -5,6 +5,7 @@ namespace App\PracticeDomain\Controller;
 use App\PracticeDomain\Entity\PracticeDomain;
 use App\PracticeDomain\Repository\PracticeDomainRepository;
 use App\Shared\Constant\ErrorCodes;
+use App\Treatment\Workflow\TreatmentWorkflowRegistry;
 use App\Shared\Controller\BaseController;
 use Doctrine\ORM\EntityManagerInterface;
 use OpenApi\Attributes as OA;
@@ -19,6 +20,7 @@ class PracticeDomainController extends BaseController
 {
     public function __construct(
         private readonly PracticeDomainRepository $domains,
+        private readonly TreatmentWorkflowRegistry $workflows,
         private readonly EntityManagerInterface   $em,
     ) {}
 
@@ -34,7 +36,7 @@ class PracticeDomainController extends BaseController
         $includeInactive = $this->isGranted('ROLE_ADMIN');
 
         return $this->success(array_map(
-            static fn (PracticeDomain $d): array => $d->toArray(),
+            fn (PracticeDomain $d): array => $d->toArray($this->workflows->hasDedicatedWorkflow($d->getCode())),
             $this->domains->findOrdered($includeInactive),
         ));
     }
@@ -73,7 +75,7 @@ class PracticeDomainController extends BaseController
         $this->em->persist($domain);
         $this->em->flush();
 
-        return $this->success($domain->toArray(), 201);
+        return $this->success($domain->toArray($this->workflows->hasDedicatedWorkflow($domain->getCode())), 201);
     }
 
     #[Route('/api/v1/practice-domain/{uuid}', name: 'practice_domain_update', methods: ['PATCH'])]
@@ -108,6 +110,6 @@ class PracticeDomainController extends BaseController
 
         $this->em->flush();
 
-        return $this->success($domain->toArray());
+        return $this->success($domain->toArray($this->workflows->hasDedicatedWorkflow($domain->getCode())));
     }
 }