fix: resolve lint issues and final integration fixes

- Fix ambiguous variable name in binance_rest.py
- Remove unused volumes variable in volume_profile_strategy.py
- Fix import ordering in backtester main.py and test_metrics.py
- Auto-format all files with ruff

1 files changed, 2 insertions, 1 deletions

diff --git a/services/strategy-engine/tests/test_engine.py b/services/strategy-engine/tests/test_engine.py
index 33ad4dd..ac9a596 100644
--- a/services/strategy-engine/tests/test_engine.py
+++ b/services/strategy-engine/tests/test_engine.py
@@ -1,4 +1,5 @@
 """Tests for the StrategyEngine."""
+
 from datetime import datetime, timezone
 from decimal import Decimal
 from unittest.mock import AsyncMock, MagicMock
@@ -6,7 +7,7 @@ from unittest.mock import AsyncMock, MagicMock
 import pytest
 
 from shared.models import Candle, Signal, OrderSide
-from shared.events import CandleEvent, SignalEvent
+from shared.events import CandleEvent
 from strategy_engine.engine import StrategyEngine