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/shared/tests/test_healthcheck.py b/shared/tests/test_healthcheck.py
index 1af86b1..6970a8f 100644
--- a/shared/tests/test_healthcheck.py
+++ b/shared/tests/test_healthcheck.py
@@ -1,6 +1,6 @@
 """Tests for health check server."""
+
 import pytest
-import asyncio
 from prometheus_client import CollectorRegistry
 
 
@@ -11,6 +11,7 @@ def registry():
 
 def make_server(service_name="test-service", port=8080, registry=None):
     from shared.healthcheck import HealthCheckServer
+
     return HealthCheckServer(service_name, port=port, registry=registry)