Merge pull request #605 from AtalayaLabs/claude/performance-optimization-analysis-sisndc

ROUND4: Row-path allocs, drive cache, CalDAV parse, PROPFIND emit, N+1 hydration, Azure streaming, faces bound

src/domain/repositories/address_book_repository.rs

@@ -24,6 +24,14 @@ pub trait AddressBookRepository: Send + Sync + 'static {
         address_book: AddressBook,
     ) -> AddressBookRepositoryResult<AddressBook>;
     async fn delete_address_book(&self, id: &Uuid) -> AddressBookRepositoryResult<()>;
+    /// Batch sibling of `get_address_book_by_id`: one `= ANY($1)`
+    /// round-trip for a page of grant-derived ids. Missing ids drop
+    /// out; ordering is not guaranteed.
+    async fn get_address_books_by_ids(
+        &self,
+        ids: &[Uuid],
+    ) -> AddressBookRepositoryResult<Vec<AddressBook>>;
+
     async fn get_address_book_by_id(
         &self,
         id: &Uuid,

src/domain/repositories/calendar_repository.rs

@@ -25,6 +25,12 @@ pub trait CalendarRepository: Send + Sync + 'static {
     /// Finds a calendar by its ID
     async fn find_calendar_by_id(&self, id: &Uuid) -> CalendarRepositoryResult<Calendar>;
 
+    /// Batch sibling of [`Self::find_calendar_by_id`]: one `= ANY($1)`
+    /// round-trip for a page of grant-derived ids. Missing ids drop out
+    /// (no per-id NotFound), matching the listing carve-out for
+    /// deleted/trashed races. Ordering is not guaranteed.
+    async fn find_calendars_by_ids(&self, ids: &[Uuid]) -> CalendarRepositoryResult<Vec<Calendar>>;
+
     /// Lists all calendars owned by a specific user. Post-Round-3 the
     /// service layer prefers `authz.list_incoming_grants` (surfaces
     /// owned + shared in one union), but this direct lookup remains

src/domain/repositories/playlist_repository.rs

@@ -13,6 +13,11 @@ pub trait PlaylistRepository: Send + Sync + 'static {
 
     async fn find_playlist_by_id(&self, id: &Uuid) -> PlaylistRepositoryResult<Playlist>;
 
+    /// Batch sibling of [`Self::find_playlist_by_id`]: one `= ANY($1)`
+    /// round-trip for a page of grant-derived ids. Missing ids drop
+    /// out; ordering is not guaranteed.
+    async fn find_playlists_by_ids(&self, ids: &[Uuid]) -> PlaylistRepositoryResult<Vec<Playlist>>;
+
     async fn list_playlists_by_owner(
         &self,
         owner_id: Uuid,