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, 13 insertions, 5 deletions

diff --git a/shared/tests/test_models.py b/shared/tests/test_models.py
index f1d92ec..25ab4c9 100644
--- a/shared/tests/test_models.py
+++ b/shared/tests/test_models.py
@@ -1,6 +1,6 @@
 """Tests for shared models and settings."""
+
 import os
-import pytest
 from decimal import Decimal
 from datetime import datetime, timezone
 from unittest.mock import patch
@@ -8,11 +8,15 @@ from unittest.mock import patch
 
 def test_settings_defaults():
     """Test that Settings has correct defaults."""
-    with patch.dict(os.environ, {
-        "BINANCE_API_KEY": "test_key",
-        "BINANCE_API_SECRET": "test_secret",
-    }):
+    with patch.dict(
+        os.environ,
+        {
+            "BINANCE_API_KEY": "test_key",
+            "BINANCE_API_SECRET": "test_secret",
+        },
+    ):
         from shared.config import Settings
+
         settings = Settings()
         assert settings.redis_url == "redis://localhost:6379"
         assert settings.database_url == "postgresql://trading:trading@localhost:5432/trading"
@@ -26,6 +30,7 @@ def test_settings_defaults():
 def test_candle_creation():
     """Test Candle model creation."""
     from shared.models import Candle
+
     now = datetime.now(timezone.utc)
     candle = Candle(
         symbol="BTCUSDT",
@@ -49,6 +54,7 @@ def test_candle_creation():
 def test_signal_creation():
     """Test Signal model creation."""
     from shared.models import Signal, OrderSide
+
     signal = Signal(
         strategy="rsi_strategy",
         symbol="BTCUSDT",
@@ -71,6 +77,7 @@ def test_order_creation():
     """Test Order model creation with defaults."""
     from shared.models import Order, OrderSide, OrderType, OrderStatus
     import uuid
+
     signal_id = str(uuid.uuid4())
     order = Order(
         signal_id=signal_id,
@@ -90,6 +97,7 @@ def test_order_creation():
 def test_position_unrealized_pnl():
     """Test Position unrealized_pnl computed property."""
     from shared.models import Position
+
     position = Position(
         symbol="BTCUSDT",
         quantity=Decimal("0.1"),