fix(lint): resolve ruff errors in tests and run_tests.py

- Fix import sorting (I001)
- Remove unused imports and variables (F401, F841)
- Add noqa for test code (S106 hardcoded passwords, S314 XML parsing)
- Auto-format with ruff format

tests/apps/parsers/test_models.py

@@ -1,13 +1,12 @@
 """Tests for parsers models."""
 
-from django.test import TestCase
-
 from apps.parsers.models import (
     IndustrialCertificateRecord,
     ManufacturerRecord,
     ParserLoadLog,
     Proxy,
 )
+from django.test import TestCase
 
 from .factories import (
     IndustrialCertificateRecordFactory,