feat(dav): Add show_deleted parameter to get_resource

Fixes #86

crates/caldav/src/calendar/service.rs

@@ -56,10 +56,11 @@ impl<C: CalendarStore, S: SubscriptionStore> ResourceService for CalendarResourc
     async fn get_resource(
         &self,
         (principal, cal_id): &Self::PathComponents,
+        show_deleted: bool,
     ) -> Result<Self::Resource, Error> {
         let calendar = self
             .cal_store
-            .get_calendar(principal, cal_id, false)
+            .get_calendar(principal, cal_id, show_deleted)
             .await?;
         Ok(CalendarResource {
             cal: calendar,

crates/caldav/src/calendar_object/service.rs

@@ -58,10 +58,11 @@ impl<C: CalendarStore> ResourceService for CalendarObjectResourceService<C> {
             calendar_id,
             object_id,
         }: &Self::PathComponents,
+        show_deleted: bool,
     ) -> Result<Self::Resource, Self::Error> {
         let object = self
             .cal_store
-            .get_object(principal, calendar_id, object_id, false)
+            .get_object(principal, calendar_id, object_id, show_deleted)
             .await?;
         Ok(CalendarObjectResource {
             object,

crates/caldav/src/principal/service.rs

@@ -48,6 +48,7 @@ impl<AP: AuthenticationProvider, S: SubscriptionStore, CS: CalendarStore> Resour
     async fn get_resource(
         &self,
         (principal,): &Self::PathComponents,
+        _show_deleted: bool,
     ) -> Result<Self::Resource, Self::Error> {
         let user = self
             .auth_provider