fix: resolve linting and formatting issues for CI

- Use contextlib.suppress instead of try/except/pass (SIM105)
- Prefix unused fixture arguments with underscore (ARG002)
- Replace asyncio.TimeoutError with TimeoutError (UP041)
- Apply ruff formatting to all files

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

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

tests/ingestor/test_websocket.py

@@ -80,19 +80,13 @@ class TestTradeStreamHandler:
 
         assert handler._event_filter == "presidential-election-2024"
 
-    def test_build_subscription_message_no_filter(
-        self, handler: TradeStreamHandler
-    ) -> None:
+    def test_build_subscription_message_no_filter(self, handler: TradeStreamHandler) -> None:
         """Test building subscription message without filters."""
         msg = handler._build_subscription_message()
 
-        assert msg == {
-            "subscriptions": [{"topic": "activity", "type": "trades"}]
-        }
+        assert msg == {"subscriptions": [{"topic": "activity", "type": "trades"}]}
 
-    def test_build_subscription_message_with_event_filter(
-        self, on_trade_mock: AsyncMock
-    ) -> None:
+    def test_build_subscription_message_with_event_filter(self, on_trade_mock: AsyncMock) -> None:
         """Test building subscription message with event filter."""
         handler = TradeStreamHandler(
             on_trade=on_trade_mock,
@@ -100,13 +94,9 @@ class TestTradeStreamHandler:
         )
         msg = handler._build_subscription_message()
 
-        assert msg["subscriptions"][0]["filters"] == json.dumps(
-            {"event_slug": "test-event"}
-        )
+        assert msg["subscriptions"][0]["filters"] == json.dumps({"event_slug": "test-event"})
 
-    def test_build_subscription_message_with_market_filter(
-        self, on_trade_mock: AsyncMock
-    ) -> None:
+    def test_build_subscription_message_with_market_filter(self, on_trade_mock: AsyncMock) -> None:
         """Test building subscription message with market filter."""
         handler = TradeStreamHandler(
             on_trade=on_trade_mock,
@@ -114,9 +104,7 @@ class TestTradeStreamHandler:
         )
         msg = handler._build_subscription_message()
 
-        assert msg["subscriptions"][0]["filters"] == json.dumps(
-            {"market_slug": "test-market"}
-        )
+        assert msg["subscriptions"][0]["filters"] == json.dumps({"market_slug": "test-market"})
 
     @pytest.mark.asyncio
     async def test_handle_message_trade(
@@ -235,7 +223,7 @@ 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
     ) -> None:
         """Test that connection sends subscription message."""
         mock_ws = AsyncMock()
@@ -254,9 +242,7 @@ class TestTradeStreamHandler:
             assert sent_msg["subscriptions"][0]["type"] == "trades"
 
     @pytest.mark.asyncio
-    async def test_cleanup_closes_websocket(
-        self, handler: TradeStreamHandler
-    ) -> None:
+    async def test_cleanup_closes_websocket(self, handler: TradeStreamHandler) -> None:
         """Test that cleanup closes the WebSocket."""
         mock_ws = AsyncMock()
         mock_ws.close = AsyncMock()
@@ -333,7 +319,7 @@ class TestTradeStreamHandlerIntegration:
             # Run with timeout to prevent hanging
             try:
                 await asyncio.wait_for(handler.start(), timeout=1.0)
-            except asyncio.TimeoutError:
+            except TimeoutError:
                 await handler.stop()
 
         # Verify trade was received