feat: Add song difficulty leaderboard feature

tools/reset_leaderboard.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+import os
+import sys
+from datetime import datetime
+from pymongo import MongoClient
+
+# Add project root to path
+sys.path.append(os.path.dirname(os.path.dirname(__file__)))
+try:
+    import config
+except ImportError:
+    # Handle case where config might not be in path or environment variables are used
+    config = None
+
+def reset_leaderboard():
+    """Delete leaderboard entries not from the current month"""
+    mongo_host = os.environ.get("TAIKO_WEB_MONGO_HOST")
+    if not mongo_host and config:
+        mongo_host = config.MONGO['host']
+        
+    db_name = "taiko"
+    if config:
+        db_name = config.MONGO['database']
+
+    if not mongo_host:
+        print("Error: content not found for MONGO_HOST")
+        return
+
+    client = MongoClient(host=mongo_host)
+    db = client[db_name]
+    
+    current_month = datetime.now().strftime('%Y-%m')
+    
+    # Delete old month data
+    result = db.leaderboard.delete_many({'month': {'$ne': current_month}})
+    
+    print(f"Deleted {result.deleted_count} old leaderboard entries")
+    print(f"Current month: {current_month}")
+    
+    client.close()
+
+if __name__ == '__main__':
+    reset_leaderboard()