chore: docstrings und tighter upsert-test fuer qdrant store

tests/test_qdrant_store.py

@@ -1,4 +1,4 @@
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 import pytest
 
 from app.qdrant_store import (
@@ -57,7 +57,15 @@ def test_upsert_chunks_calls_client_upsert():
     fake_client.upsert.assert_called_once()
     kwargs = fake_client.upsert.call_args.kwargs
     assert kwargs["collection_name"] == "rag_test"
-    assert len(kwargs["points"]) == 2
+    produced = kwargs["points"]
+    assert len(produced) == 2
+    assert produced[0].vector == [0.1] * 4
+    assert produced[0].payload == {"file_path": "a", "chunk_index": 0}
+    assert produced[1].vector == [0.2] * 4
+    assert produced[1].payload == {"file_path": "a", "chunk_index": 1}
+    # ids are UUID strings, distinct
+    assert isinstance(produced[0].id, str)
+    assert produced[0].id != produced[1].id
 
 
 def test_delete_by_path_uses_filter():