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, 5 deletions

diff --git a/services/strategy-engine/src/strategy_engine/plugin_loader.py b/services/strategy-engine/src/strategy_engine/plugin_loader.py
index f99b670..62e4160 100644
--- a/services/strategy-engine/src/strategy_engine/plugin_loader.py
+++ b/services/strategy-engine/src/strategy_engine/plugin_loader.py
@@ -1,4 +1,5 @@
 """Dynamic plugin loader for strategy modules."""
+
 import importlib.util
 import sys
 from pathlib import Path
@@ -29,11 +30,7 @@ def load_strategies(strategies_dir: Path) -> list[BaseStrategy]:
 
         for attr_name in dir(module):
             obj = getattr(module, attr_name)
-            if (
-                isinstance(obj, type)
-                and issubclass(obj, BaseStrategy)
-                and obj is not BaseStrategy
-            ):
+            if isinstance(obj, type) and issubclass(obj, BaseStrategy) and obj is not BaseStrategy:
                 instance = obj()
                 yaml_path = config_dir / f"{path.stem}.yaml"
                 if yaml_path.exists():