feat: simplify return type of catalog.list method

01.workspace/heave/examples/using_filters.rs

@@ -134,7 +134,6 @@ fn main() {
         .list::<Component>()
         .unwrap()
         .into_iter()
-        .map(|c| c.unwrap())
         .collect();
     // Print the loaded components
     println!(

01.workspace/heave/examples/working_with_many_types.rs

@@ -145,7 +145,6 @@ fn main() -> Result<(), FailedTo> {
         .list()
         .unwrap()
         .into_iter()
-        .map(|p| p.unwrap())
         .collect();
 
     println!("✅ Loaded {} laptop(s) using filter.", laptops.len());
@@ -173,7 +172,6 @@ fn main() -> Result<(), FailedTo> {
         .list()
         .unwrap()
         .into_iter()
-        .map(|p| p.unwrap())
         .collect();
 
     println!(
@@ -205,7 +203,6 @@ fn main() -> Result<(), FailedTo> {
         .list()
         .unwrap()
         .into_iter()
-        .map(|p| p.unwrap())
         .collect();
 
     println!("✅ Loaded {} total products.", all_products.len());

01.workspace/heave/src/imp/catalog_list.rs

@@ -20,7 +20,7 @@ impl Catalog {
     ///
     /// Returns `Err(FailedTo::LockCatalog)` if the catalog's internal mutex
     /// could not be locked.
-    pub fn list<T>(&self) -> Result<Vec<Result<T, FailedTo>>, FailedTo>
+    pub fn list<T>(&self) -> Result<Vec<T>, FailedTo>
     where
         T: EAV,
     {
@@ -28,7 +28,7 @@ impl Catalog {
             Ok(items
                 .values()
                 .filter(move |item| item.class == T::class())
-                .map(|item| T::try_from(item.clone()).map_err(|_| FailedTo::ConvertEntity))
+                .filter_map(|item| T::try_from(item.clone()).ok())
                 .collect())
         })
     }

01.workspace/heave/src/tst/catalog_integration.rs

@@ -74,7 +74,6 @@ mod tests {
             .list::<Item>()
             .unwrap()
             .into_iter()
-            .map(|item| item.unwrap())
             .collect();
         // Sort by ID to ensure consistent order for comparison
         let mut expected_items = items_to_insert;

01.workspace/heave/src/tst/catalog_list_by_class.rs

@@ -27,8 +27,8 @@ mod tests {
         let _ = catalog.upsert(item2.clone());
         let results = catalog.list::<Item>().unwrap();
         assert_eq!(results.len(), 2);
-        assert!(results.contains(&Ok(item1)));
-        assert!(results.contains(&Ok(item2)));
+        assert!(results.contains(&item1));
+        assert!(results.contains(&item2));
     }
     #[test]
     fn list_by_class_should_return_empty_iterator_if_no_match() {