fix: Add missing logger declaration in _check_and_load_cache

The regex import removal was too aggressive and removed logger
from _check_and_load_cache method scope. Added it back.

Fixes CI pyright errors.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
EOF

Author: wesm

moneyflow/app.py

@@ -447,6 +447,8 @@ async def _check_and_load_cache(self, loading_status):
         Returns:
             tuple: (df, categories, category_groups) or None if not using cache
         """
+        logger = get_logger(__name__)
+
         use_cache = False
         if (
             self.cache_manager