fix(orm): declare repositoryClass on all entities with a custom repository

On prod (opcache.preload + prod container), getRepository(Entity::class)
returned Doctrine's default repository instead of the custom one when the
entity's #[ORM\Entity] had no repositoryClass — so custom finders like
DoctorSecretaryRepository::findAllActiveBySecretary threw BadMethodCallException,
making /oauth/userinfo return 500 after login. Declare repositoryClass explicitly
on all 25 affected entities.

Also add app:create-admin command (create/promote a ROLE_ADMIN user by mobile).

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

src/Config/Entity/SiteConfig.php

@@ -4,7 +4,8 @@ namespace App\Config\Entity;
 
 use Doctrine\ORM\Mapping as ORM;
 
-#[ORM\Entity]
+use App\Config\Repository\SiteConfigRepository;
+#[ORM\Entity(repositoryClass: SiteConfigRepository::class)]
 #[ORM\Table(name: 'site_config')]
 class SiteConfig
 {