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/share_repository.rs

@@ -1,4 +1,3 @@
-
 use async_trait::async_trait;
 use thiserror::Error;
 
@@ -25,22 +24,26 @@ pub enum ShareRepositoryError {
 pub trait ShareRepository: Send + Sync + 'static {
     /// Save a new share or update an existing one
     async fn save(&self, share: &Share) -> Result<Share, ShareRepositoryError>;
-    
+
     /// Find a share by its ID
     async fn find_by_id(&self, id: &str) -> Result<Share, ShareRepositoryError>;
-    
+
     /// Find a share by its token
     async fn find_by_token(&self, token: &str) -> Result<Share, ShareRepositoryError>;
-    
+
     /// Find all shares for a specific item
-    async fn find_by_item(&self, item_id: &str, item_type: &ShareItemType) -> Result<Vec<Share>, ShareRepositoryError>;
-    
+    async fn find_by_item(
+        &self,
+        item_id: &str,
+        item_type: &ShareItemType,
+    ) -> Result<Vec<Share>, ShareRepositoryError>;
+
     /// Delete a share by its ID
     async fn delete(&self, id: &str) -> Result<(), ShareRepositoryError>;
-    
+
     /// Find all shares created by a specific user
     async fn find_by_user(&self, user_id: &str) -> Result<Vec<Share>, ShareRepositoryError>;
-    
+
     /// Find all shares (admin operation)
     async fn find_all(&self) -> Result<Vec<Share>, ShareRepositoryError>;
 }