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/calendar_event_repository.rs

@@ -1,8 +1,8 @@
-use async_trait::async_trait;
-use uuid::Uuid;
-use chrono::{DateTime, Utc};
 use crate::common::errors::DomainError;
 use crate::domain::entities::calendar_event::CalendarEvent;
+use async_trait::async_trait;
+use chrono::{DateTime, Utc};
+use uuid::Uuid;
 
 pub type CalendarEventRepositoryResult<T> = Result<T, DomainError>;
 
@@ -10,53 +10,76 @@ pub type CalendarEventRepositoryResult<T> = Result<T, DomainError>;
 #[async_trait]
 pub trait CalendarEventRepository: Send + Sync + 'static {
     /// Creates a new calendar event
-    async fn create_event(&self, event: CalendarEvent) -> CalendarEventRepositoryResult<CalendarEvent>;
-    
+    async fn create_event(
+        &self,
+        event: CalendarEvent,
+    ) -> CalendarEventRepositoryResult<CalendarEvent>;
+
     /// Updates an existing calendar event
-    async fn update_event(&self, event: CalendarEvent) -> CalendarEventRepositoryResult<CalendarEvent>;
-    
+    async fn update_event(
+        &self,
+        event: CalendarEvent,
+    ) -> CalendarEventRepositoryResult<CalendarEvent>;
+
     /// Deletes a calendar event by ID
     async fn delete_event(&self, id: &Uuid) -> CalendarEventRepositoryResult<()>;
-    
+
     /// Finds a calendar event by its ID
     async fn find_event_by_id(&self, id: &Uuid) -> CalendarEventRepositoryResult<CalendarEvent>;
-    
+
     /// Lists all events in a specific calendar
-    async fn list_events_by_calendar(&self, calendar_id: &Uuid) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
-    
+    async fn list_events_by_calendar(
+        &self,
+        calendar_id: &Uuid,
+    ) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
+
     /// Finds events in a calendar by their summary/title (partial match)
-    async fn find_events_by_summary(&self, calendar_id: &Uuid, summary: &str) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
-    
+    async fn find_events_by_summary(
+        &self,
+        calendar_id: &Uuid,
+        summary: &str,
+    ) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
+
     /// Gets events in a specific time range for a calendar
     async fn get_events_in_time_range(
-        &self, 
-        calendar_id: &Uuid, 
-        start: &DateTime<Utc>, 
-        end: &DateTime<Utc>
+        &self,
+        calendar_id: &Uuid,
+        start: &DateTime<Utc>,
+        end: &DateTime<Utc>,
     ) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
-    
+
     /// Finds an event by its iCalendar UID in a specific calendar
-    async fn find_event_by_ical_uid(&self, calendar_id: &Uuid, ical_uid: &str) -> CalendarEventRepositoryResult<Option<CalendarEvent>>;
-    
+    async fn find_event_by_ical_uid(
+        &self,
+        calendar_id: &Uuid,
+        ical_uid: &str,
+    ) -> CalendarEventRepositoryResult<Option<CalendarEvent>>;
+
     /// Counts events in a calendar
-    async fn count_events_in_calendar(&self, calendar_id: &Uuid) -> CalendarEventRepositoryResult<i64>;
-    
+    async fn count_events_in_calendar(
+        &self,
+        calendar_id: &Uuid,
+    ) -> CalendarEventRepositoryResult<i64>;
+
     /// Deletes all events in a calendar
-    async fn delete_all_events_in_calendar(&self, calendar_id: &Uuid) -> CalendarEventRepositoryResult<i64>;
-    
+    async fn delete_all_events_in_calendar(
+        &self,
+        calendar_id: &Uuid,
+    ) -> CalendarEventRepositoryResult<i64>;
+
     /// Lists events by calendar with pagination
     async fn list_events_by_calendar_paginated(
-        &self, 
+        &self,
         calendar_id: &Uuid,
         limit: i64,
-        offset: i64
+        offset: i64,
     ) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
-    
+
     /// Finds events with recurrence rules that might occur in a time range
     async fn find_recurring_events_in_range(
         &self,
         calendar_id: &Uuid,
         start: &DateTime<Utc>,
-        end: &DateTime<Utc>
+        end: &DateTime<Utc>,
     ) -> CalendarEventRepositoryResult<Vec<CalendarEvent>>;
-}
+}