fix: auto-apply DB schema on fresh install and fix admin registration (#81)

- Auto-apply schema.sql when database tables don't exist (embedded in binary)
- Handle missing tables gracefully during admin registration (treat as fresh install)
- Fix docker-compose depends_on to wait for postgres healthcheck
- Rename personal folder from 'Mi Carpeta' to 'My Folder' with backward compat
- Translate remaining Spanish messages to English

src/application/services/recent_service.rs

@@ -59,7 +59,7 @@ impl RecentItemsUseCase for RecentService {
         info!("Removing {} '{}' from recent for user {}", item_type, item_id, user_id);
         let removed = self.repo.remove_item(user_id, item_id, item_type).await?;
         info!(
-            "{} {} '{}' de recientes para usuario {}",
+            "{} {} '{}' from recent items for user {}",
             if removed { "Successfully removed" } else { "Not found" },
             item_type, item_id, user_id
         );