add get_by_entity_node_uuid (#357)

* add get_by_entity_node_uuid

* Update graphiti_core/nodes.py

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

---------

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

graphiti_core/nodes.py

@@ -251,6 +251,31 @@ class EpisodicNode(Node):
 
         return episodes
 
+    @classmethod
+    async def get_by_entity_node_uuid(cls, driver: AsyncDriver, entity_node_uuid: str):
+        records, _, _ = await driver.execute_query(
+            """
+        MATCH (e:Episodic)-[r:MENTIONS]->(n:Entity {uuid: $entity_node_uuid})
+            RETURN DISTINCT
+            e.content AS content,
+            e.created_at AS created_at,
+            e.valid_at AS valid_at,
+            e.uuid AS uuid,
+            e.name AS name,
+            e.group_id AS group_id,
+            e.source_description AS source_description,
+            e.source AS source,
+            e.entity_edges AS entity_edges
+        """,
+            entity_node_uuid=entity_node_uuid,
+            database_=DEFAULT_DATABASE,
+            routing_='r',
+        )
+
+        episodes = [get_episodic_node_from_record(record) for record in records]
+
+        return episodes
+
 
 class EntityNode(Node):
     name_embedding: list[float] | None = Field(default=None, description='embedding of the name')