fix(deploy): run seed + media:generate-variants after migrate

staging R2 was empty — migrate ran but no seeder, so ContentSeeder
never placed fixtures on the configured disk (r2) and media:generate-variants
had nothing for image paths. Staging deploy now seeds content.

docker-compose.deploy.yml

@@ -14,7 +14,11 @@ services:
     restart: "no"
     env_file:
       - .env
-    command: ["php", "artisan", "migrate", "--force", "--no-interaction"]
+    command: >
+      sh -c
+      "php artisan migrate --force --no-interaction
+       && php artisan db:seed --class=ContentSeeder --force --no-interaction
+       && php artisan media:generate-variants --force"
     networks:
       - dokploy-network