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/address_book_repository.rs

@@ -1,6 +1,6 @@
 use async_trait::async_trait;
-use uuid::Uuid;
 use std::result::Result;
+use uuid::Uuid;
 
 use crate::common::errors::DomainError;
 use crate::domain::entities::contact::AddressBook;
@@ -9,14 +9,41 @@ pub type AddressBookRepositoryResult<T> = Result<T, DomainError>;
 
 #[async_trait]
 pub trait AddressBookRepository: Send + Sync + 'static {
-    async fn create_address_book(&self, address_book: AddressBook) -> AddressBookRepositoryResult<AddressBook>;
-    async fn update_address_book(&self, address_book: AddressBook) -> AddressBookRepositoryResult<AddressBook>;
+    async fn create_address_book(
+        &self,
+        address_book: AddressBook,
+    ) -> AddressBookRepositoryResult<AddressBook>;
+    async fn update_address_book(
+        &self,
+        address_book: AddressBook,
+    ) -> AddressBookRepositoryResult<AddressBook>;
     async fn delete_address_book(&self, id: &Uuid) -> AddressBookRepositoryResult<()>;
-    async fn get_address_book_by_id(&self, id: &Uuid) -> AddressBookRepositoryResult<Option<AddressBook>>;
-    async fn get_address_books_by_owner(&self, owner_id: &str) -> AddressBookRepositoryResult<Vec<AddressBook>>;
-    async fn get_shared_address_books(&self, user_id: &str) -> AddressBookRepositoryResult<Vec<AddressBook>>;
+    async fn get_address_book_by_id(
+        &self,
+        id: &Uuid,
+    ) -> AddressBookRepositoryResult<Option<AddressBook>>;
+    async fn get_address_books_by_owner(
+        &self,
+        owner_id: &str,
+    ) -> AddressBookRepositoryResult<Vec<AddressBook>>;
+    async fn get_shared_address_books(
+        &self,
+        user_id: &str,
+    ) -> AddressBookRepositoryResult<Vec<AddressBook>>;
     async fn get_public_address_books(&self) -> AddressBookRepositoryResult<Vec<AddressBook>>;
-    async fn share_address_book(&self, address_book_id: &Uuid, user_id: &str, can_write: bool) -> AddressBookRepositoryResult<()>;
-    async fn unshare_address_book(&self, address_book_id: &Uuid, user_id: &str) -> AddressBookRepositoryResult<()>;
-    async fn get_address_book_shares(&self, address_book_id: &Uuid) -> AddressBookRepositoryResult<Vec<(String, bool)>>;
-}
+    async fn share_address_book(
+        &self,
+        address_book_id: &Uuid,
+        user_id: &str,
+        can_write: bool,
+    ) -> AddressBookRepositoryResult<()>;
+    async fn unshare_address_book(
+        &self,
+        address_book_id: &Uuid,
+        user_id: &str,
+    ) -> AddressBookRepositoryResult<()>;
+    async fn get_address_book_shares(
+        &self,
+        address_book_id: &Uuid,
+    ) -> AddressBookRepositoryResult<Vec<(String, bool)>>;
+}