style: apply cargo fmt to entire codebase

Standardize code formatting across all 173 Rust source files
using rustfmt. No functional changes - purely cosmetic.

This establishes a consistent code style baseline for the
project going forward.

src/domain/repositories/trash_repository.rs

@@ -1,8 +1,8 @@
 use async_trait::async_trait;
 use uuid::Uuid;
 
-use crate::domain::entities::trashed_item::TrashedItem;
 use crate::common::errors::Result;
+use crate::domain::entities::trashed_item::TrashedItem;
 
 #[async_trait]
 pub trait TrashRepository: Send + Sync {
@@ -13,4 +13,4 @@ pub trait TrashRepository: Send + Sync {
     async fn delete_permanently(&self, id: &Uuid, user_id: &Uuid) -> Result<()>;
     async fn clear_trash(&self, user_id: &Uuid) -> Result<()>;
     async fn get_expired_items(&self) -> Result<Vec<TrashedItem>>;
-}
+}