Should be using uuid4 not uuid1 (#27)

Use uuid4

Author: eyurtsev

langchain_postgres/vectorstores.py

@@ -430,7 +430,7 @@ def __from(
         **kwargs: Any,
     ) -> PGVector:
         if ids is None:
-            ids = [str(uuid.uuid1()) for _ in texts]
+            ids = [str(uuid.uuid4()) for _ in texts]
 
         if not metadatas:
             metadatas = [{} for _ in texts]
@@ -468,7 +468,7 @@ def add_embeddings(
             kwargs: vectorstore specific parameters
         """
         if ids is None:
-            ids = [str(uuid.uuid1()) for _ in texts]
+            ids = [str(uuid.uuid4()) for _ in texts]
 
         if not metadatas:
             metadatas = [{} for _ in texts]