fix: wrap embeddings with vecf32() in FalkorDB single save paths (#991)

Fixes #972. Entity and edge single save operations now properly convert
embeddings to vecf32 type, matching bulk save behavior and preventing
type mismatch errors during vector similarity searches.

graphiti_core/models/edges/edge_db_queries.py

@@ -68,6 +68,7 @@ def get_entity_edge_save_query(provider: GraphProvider, has_aoss: bool = False)
                 MATCH (target:Entity {uuid: $edge_data.target_uuid})
                 MERGE (source)-[e:RELATES_TO {uuid: $edge_data.uuid}]->(target)
                 SET e = $edge_data
+                SET e.fact_embedding = vecf32($edge_data.fact_embedding)
                 RETURN e.uuid AS uuid
             """
         case GraphProvider.NEPTUNE:

graphiti_core/models/nodes/node_db_queries.py

@@ -133,6 +133,7 @@ def get_entity_node_save_query(provider: GraphProvider, labels: str, has_aoss: b
                 MERGE (n:Entity {{uuid: $entity_data.uuid}})
                 SET n:{labels}
                 SET n = $entity_data
+                SET n.name_embedding = vecf32($entity_data.name_embedding)
                 RETURN n.uuid AS uuid
             """
         case GraphProvider.KUZU: