feat: add VisibilityFilteredAssetRepository decorator for automatic access control on asset queries

crates/presentation/src/handlers/assets.rs

@@ -82,6 +82,7 @@ pub async fn timeline(
 ) -> Result<Json<TimelineResponse>, AppError> {
     let query = GetTimelineQuery {
         owner_id: claims.user_id,
+        caller_id: None,
         limit: params.limit.unwrap_or(DEFAULT_PAGE_SIZE).min(MAX_PAGE_SIZE),
         offset: params.offset.unwrap_or(0),
     };