fix: lint cleanup for API, combined strategy, and formatting

1 files changed, 2 insertions, 1 deletions

diff --git a/services/strategy-engine/strategies/combined_strategy.py b/services/strategy-engine/strategies/combined_strategy.py
index e99dfdf..507ef5b 100644
--- a/services/strategy-engine/strategies/combined_strategy.py
+++ b/services/strategy-engine/strategies/combined_strategy.py
@@ -1,6 +1,6 @@
 """Combined strategy that aggregates signals from multiple sub-strategies."""
+
 from decimal import Decimal
-from typing import Optional
 
 from shared.models import Candle, Signal, OrderSide
 from strategies.base import BaseStrategy
@@ -12,6 +12,7 @@ class CombinedStrategy(BaseStrategy):
     Each sub-strategy votes BUY (+weight), SELL (-weight), or HOLD (0).
     The combined signal fires when the weighted sum exceeds a threshold.
     """
+
     name: str = "combined"
 
     def __init__(self) -> None: