Remove stale cassette, dead vcr_cassette_dir fixtures, and unnecessary VCR decorator

tests/test_client_research.py

@@ -1,17 +1,9 @@
-from pathlib import Path
 from unittest.mock import AsyncMock, patch
 
-import pytest
-
 from haiku.rag.agents.research.models import ResearchReport
 from haiku.rag.client import HaikuRAG
 
 
-@pytest.fixture(scope="module")
-def vcr_cassette_dir():
-    return str(Path(__file__).parent / "cassettes" / "test_client_research")
-
-
 async def test_client_research_report(temp_db_path):
     """Test client.research() delegates to research graph in report mode."""
     mock_report = ResearchReport(

tests/test_download_models.py

@@ -1,5 +1,4 @@
 from contextlib import asynccontextmanager
-from pathlib import Path
 from unittest.mock import AsyncMock, patch
 
 import httpx
@@ -8,11 +7,6 @@ import pytest
 from haiku.rag.client import HaikuRAG
 
 
-@pytest.fixture(scope="module")
-def vcr_cassette_dir():
-    return str(Path(__file__).parent / "cassettes" / "test_download_models")
-
-
 @pytest.fixture
 def mock_to_thread():
     """Patch asyncio.to_thread to skip docling/tokenizer downloads."""

tests/test_embedder.py

@@ -154,8 +154,7 @@ async def test_embed_chunks_returns_new_objects(allow_model_requests):
     assert embedded[0] is not original
 
 
-@pytest.mark.vcr()
+async def test_embed_chunks_empty_list():
-async def test_embed_chunks_empty_list(allow_model_requests):
     """Test that embed_chunks handles empty list."""
     result = await embed_chunks([])
     assert result == []