fix CI: stub _get_sentence_transformer in remaining search tests, use kuzu_graph for meta test

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: HumanBean17

tests/test_mcp_v2.py

@@ -594,6 +594,7 @@ def test_search_cross_kind_filter_returns_failure(monkeypatch, kuzu_graph) -> No
 
 
 def test_search_filter_empty_string_treated_as_none(monkeypatch, kuzu_graph) -> None:
+    monkeypatch.setattr("mcp_v2._get_sentence_transformer", lambda *a, **kw: None)
     monkeypatch.setattr("mcp_v2.run_search", lambda *args, **kwargs: _fake_search_rows())
     baseline = search_v2("ChatService", graph=kuzu_graph)
     empty = search_v2("ChatService", filter="", graph=kuzu_graph)
@@ -605,6 +606,7 @@ def test_search_filter_empty_string_treated_as_none(monkeypatch, kuzu_graph) ->
 
 
 def test_search_filter_json_null_treated_as_none(monkeypatch, kuzu_graph) -> None:
+    monkeypatch.setattr("mcp_v2._get_sentence_transformer", lambda *a, **kw: None)
     monkeypatch.setattr("mcp_v2.run_search", lambda *args, **kwargs: _fake_search_rows())
     baseline = search_v2("ChatService", graph=kuzu_graph)
     out = search_v2("ChatService", filter="null", graph=kuzu_graph)

tests/test_mcp_v2_compose.py

@@ -233,7 +233,7 @@ def test_search_populates_symbol_id_when_chunk_rooted_in_symbol(monkeypatch, kuz
     assert all(hit.symbol_id is not None for hit in rooted)
 
 
-def test_meta_returns_per_edge_type_counts(mcp_env) -> None:
+def test_meta_returns_per_edge_type_counts(kuzu_graph) -> None:
     out = _graph_meta_output()
     assert out.success is True
     assert set(out.edge_counts.keys()) == set(_EDGE_TYPES)