feat(permissions) : add role-based access control system

Backend:
- Add role hierarchy (ADMIN > GESTIONNAIRE > VIEWER > USER) in security.yaml
- Add password authentication on profile activation (SessionProfileController)
- Add SessionProfileAuthenticator with stateless API firewall
- Add ProfilePasswordHasher state processor for API Platform
- Add security annotations on all 18 API Platform entities
- Add denyAccessUnlessGranted on all 13 custom controllers
- Add AdminProfileController for profile/role management (/api/admin/profiles)
- Add InitProfilePasswordsCommand for initial admin setup
- Simplify SessionProfilesController to list-only (removed create/delete)

Frontend (submodule update):
- Add usePermissions composable (isAdmin, canEdit, canView, isGranted)
- Add password login modal on profiles page
- Add admin backoffice page for profile management
- Disable all form fields for ROLE_VIEWER across all edit/create pages
- Show navigation buttons for all roles, hide destructive actions for viewers
- Add readonly mode to ModelTypeForm and site/constructeur modals
- Guard /admin routes in middleware
- Configure Vite proxy for API requests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/Entity/CustomField.php

@@ -5,6 +5,12 @@ declare(strict_types=1);
 namespace App\Entity;
 
 use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Delete;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Patch;
+use ApiPlatform\Metadata\Post;
+use ApiPlatform\Metadata\Put;
 use App\Repository\CustomFieldRepository;
 use DateTimeImmutable;
 use Doctrine\Common\Collections\ArrayCollection;
@@ -16,7 +22,16 @@ use Symfony\Component\Serializer\Attribute\Groups;
 #[ORM\Entity(repositoryClass: CustomFieldRepository::class)]
 #[ORM\Table(name: 'custom_fields')]
 #[ORM\HasLifecycleCallbacks]
-#[ApiResource]
+#[ApiResource(
+    operations: [
+        new Get(security: "is_granted('ROLE_VIEWER')"),
+        new GetCollection(security: "is_granted('ROLE_VIEWER')"),
+        new Post(security: "is_granted('ROLE_GESTIONNAIRE')"),
+        new Put(security: "is_granted('ROLE_GESTIONNAIRE')"),
+        new Patch(security: "is_granted('ROLE_GESTIONNAIRE')"),
+        new Delete(security: "is_granted('ROLE_GESTIONNAIRE')"),
+    ]
+)]
 class CustomField
 {
     #[ORM\Id]