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/infrastructure/adapters/mod.rs

@@ -1,16 +1,16 @@
-//! Infrastructure Adapters
-//! 
-//! This module contains adapters that bridge the gap between domain repositories
-//! and application ports. These adapters implement the application layer ports
-//! using the infrastructure layer repositories.
-//!
-//! It also includes error adapters for converting infrastructure-specific errors
-//! to domain errors, following Clean Architecture principles.
-
-pub mod calendar_storage_adapter;
-pub mod contact_storage_adapter;
-pub mod error_adapters;
-
-pub use calendar_storage_adapter::CalendarStorageAdapter;
-pub use contact_storage_adapter::ContactStorageAdapter;
-pub use error_adapters::IntoDomainError;
+//! Infrastructure Adapters
+//!
+//! This module contains adapters that bridge the gap between domain repositories
+//! and application ports. These adapters implement the application layer ports
+//! using the infrastructure layer repositories.
+//!
+//! It also includes error adapters for converting infrastructure-specific errors
+//! to domain errors, following Clean Architecture principles.
+
+pub mod calendar_storage_adapter;
+pub mod contact_storage_adapter;
+pub mod error_adapters;
+
+pub use calendar_storage_adapter::CalendarStorageAdapter;
+pub use contact_storage_adapter::ContactStorageAdapter;
+pub use error_adapters::IntoDomainError;