fix: correct test fixture names and add aiosqlite dependency

- Revert underscore-prefixed fixture parameters (breaks pytest discovery)
- Use # noqa: ARG002 comments instead
- Add aiosqlite to dev dependencies for SQLite-based tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -28,6 +28,7 @@ dev = [
     "ruff>=0.1.0",
     "mypy>=1.7.0",
     "pre-commit>=3.0.0",
+    "aiosqlite>=0.19.0",
 ]
 
 [build-system]

tests/ingestor/test_clob_client.py

@@ -118,20 +118,20 @@ class TestClobClient:
         with patch("polymarket_insider_tracker.ingestor.clob_client.BaseClobClient") as mock:
             yield mock.return_value
 
-    def test_init_defaults(self, _mock_base_client: MagicMock) -> None:
+    def test_init_defaults(self, mock_base_client: MagicMock) -> None:  # noqa: ARG002
         """Test client initialization with defaults."""
         client = ClobClient()
 
         assert client._host == "https://clob.polymarket.com"
         assert client._max_retries == 3
 
-    def test_init_with_env_api_key(self, _mock_base_client: MagicMock) -> None:
+    def test_init_with_env_api_key(self, mock_base_client: MagicMock) -> None:  # noqa: ARG002
         """Test client reads API key from environment."""
         with patch.dict("os.environ", {"POLYMARKET_API_KEY": "test-key"}):
             client = ClobClient()
             assert client._api_key == "test-key"
 
-    def test_init_with_explicit_api_key(self, _mock_base_client: MagicMock) -> None:
+    def test_init_with_explicit_api_key(self, mock_base_client: MagicMock) -> None:  # noqa: ARG002
         """Test client uses explicitly provided API key."""
         client = ClobClient(api_key="explicit-key")
         assert client._api_key == "explicit-key"

tests/ingestor/test_websocket.py

@@ -223,7 +223,9 @@ class TestTradeStreamHandler:
 
     @pytest.mark.asyncio
     async def test_connect_sends_subscription(
-        self, handler: TradeStreamHandler, _on_state_change_mock: AsyncMock
+        self,
+        handler: TradeStreamHandler,
+        on_state_change_mock: AsyncMock,  # noqa: ARG002
     ) -> None:
         """Test that connection sends subscription message."""
         mock_ws = AsyncMock()