fix: use the published version's created date as component last_publi…

…shed

instead of the publish log, which is only populated for the parent
library, not each component.

openedx/core/djangoapps/content_libraries/api.py

@@ -206,8 +206,6 @@ def from_component(cls, library_key, component):
         """
         Construct a LibraryXBlockMetadata from a Component object.
         """
-        last_publish_log = authoring_api.get_last_publish(component.pk)
-
         return cls(
             usage_key=LibraryUsageLocatorV2(
                 library_key,
@@ -217,7 +215,7 @@ def from_component(cls, library_key, component):
             display_name=component.versioning.draft.title,
             created=component.created,
             modified=component.versioning.draft.created,
-            last_published=None if last_publish_log is None else last_publish_log.published_at,
+            last_published=component.versioning.published.created if component.versioning.published else None,
             has_unpublished_changes=component.versioning.has_unpublished_changes
         )