Introduce `OptionalAuthGuard` to allow conditional authentication for routes. Update `AuthModule` to include `AuthGuard`, `OptionalAuthGuard`, and `RolesGuard` in providers and exports for broader reuse.
feat(app): integrate `AdminModule` into app module
Add `AdminModule` to the app's main module to enable administration functionalities.
feat(users): enhance user profiles with bio and avatar fields
Extend `UpdateUserDto` to include optional `bio` and `avatarUrl` fields for better user customization.
feat(categories): add functionality to count all categories
Implement `countAll` method in `CategoriesRepository` to fetch the total number of categories using raw SQL counting.
Introduce `CrawlerDetectionMiddleware` to identify and log potential crawlers or bots accessing suspicious paths or using bot-like user agents. Middleware applied globally to all routes in `AppModule`.
Optimized import order, applied consistent formatting, and improved readability in various modules, including `contents`, `media`, and `auth` services.
Enhanced AppModule by adding support for caching (Redis), scheduling, throttling, and multiple feature modules including AuthModule, CategoriesModule, ContentsModule, FavoritesModule, ReportsModule, TagsModule, and more. Improved environment validation and health check controller setup.
