chore: replace fake() helper in DatabaseSeeder for production compatibility

[coolert]

PR Summary

Fixes a production-only failure in DatabaseSeeder where the global fake() helper was not available. This adjusts the seeder to use Faker\Factory explicitly so it works consistently across local, CI, Docker, and production environments.

---

Changes

• Replaced fake()->seed(...) with explicit Faker instance: Faker\Factory::create()->seed(...)
• Ensures seeding works on Debian / PHP-FPM production servers where fake() helper may not be autoloaded by default.
• No behavior change for CI or local Sail environment.

---

Type of Change

• Feature
• Fix
• Docs
• Refactor
• CI
• Other