chore: fix quality

Author: bradenmacdonald

src/openedx_tagging/models/base.py

@@ -173,7 +173,7 @@ def descendant_count(self) -> int:
             ).count()
         return 0
 
-    def save(self, *args, **kwargs):
+    def save(self, *args, **kwargs) -> None:
         """
         Compute and persist depth and lineage before saving, then cascade any changes to descendants.
         """
@@ -187,8 +187,8 @@ def save(self, *args, **kwargs):
             self.lineage = self.value + "\t"
         else:
             if Tag.parent.is_cached(self):  # pylint: disable=no-member
-                parent_depth = self.parent.depth
-                parent_lineage = self.parent.lineage
+                parent_depth = self.parent.depth  # type: ignore[union-attr]
+                parent_lineage = self.parent.lineage  # type: ignore[union-attr]
             else:
                 parent_vals = Tag.objects.values("depth", "lineage").get(pk=self.parent_id)
                 parent_depth = parent_vals["depth"]
@@ -216,7 +216,9 @@ def save(self, *args, **kwargs):
             }
             if depth_delta != 0:
                 update_kwargs["depth"] = F("depth") + depth_delta
-            self.taxonomy.tag_set.filter(lineage__startswith=old_values["lineage"]).exclude(pk=self.pk).update(
+            self.taxonomy.tag_set.filter(  # type: ignore[union-attr]
+                lineage__startswith=old_values["lineage"]
+            ).exclude(pk=self.pk).update(
                 **update_kwargs
             )
 
@@ -602,7 +604,7 @@ def _get_filtered_tags_deep(
             .order_by()
             .annotate(count=models.Func(F("id"), function="Count"))
         )
-        qs = initial_qs.annotate(child_count=models.Subquery(child_count_sq.values("count")))
+        qs = initial_qs.annotate(child_count=models.Subquery(child_count_sq.values("count")))  # type: ignore[no-redef]
 
         # Add the parent value
         qs = qs.annotate(parent_value=F("parent__value"))