implemented the deletion of unnecesarry details in not chosen objects, for the sake of memory efficiency in the history

src/music_kraken/objects/collection.py

@@ -158,3 +158,6 @@ class Collection:
     @property
     def empty(self) -> bool:
         return len(self._data) == 0
+
+    def clear(self):
+        self.__init__(element_type=self.element_type)

src/music_kraken/objects/parents.py

@@ -95,6 +95,10 @@ class DatabaseObject:
             if override or getattr(self, simple_attribute) == default_value:
                 setattr(self, simple_attribute, getattr(other, simple_attribute))
 
+    def strip_details(self):
+        for collection in type(self).DOWNWARDS_COLLECTION_ATTRIBUTES:
+            getattr(self, collection).clear()
+
     @property
     def metadata(self) -> Metadata:
         return Metadata()