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, 3 insertions, 2 deletions

diff --git a/services/data-collector/src/data_collector/binance_rest.py b/services/data-collector/src/data_collector/binance_rest.py
index af0eb77..eaf4e30 100644
--- a/services/data-collector/src/data_collector/binance_rest.py
+++ b/services/data-collector/src/data_collector/binance_rest.py
@@ -1,4 +1,5 @@
 """Binance REST API helpers for fetching historical candle data."""
+
 from datetime import datetime, timezone
 from decimal import Decimal
 
@@ -35,7 +36,7 @@ async def fetch_historical_candles(
     candles: list[Candle] = []
 
     for row in rows:
-        ts_ms, o, h, l, c, v = row
+        ts_ms, o, h, low, c, v = row
         open_time = datetime.fromtimestamp(ts_ms / 1000, tz=timezone.utc)
         candles.append(
             Candle(
@@ -44,7 +45,7 @@ async def fetch_historical_candles(
                 open_time=open_time,
                 open=Decimal(str(o)),
                 high=Decimal(str(h)),
-                low=Decimal(str(l)),
+                low=Decimal(str(low)),
                 close=Decimal(str(c)),
                 volume=Decimal(str(v)),
             )