Разделение на файлы, мелкие доработки.

cleanup.py

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+import time
+from datetime import datetime
+
+import database
+from config import load_config
+
+global CONFIG
+CONFIG = load_config()
+
+
+def session_cleanup():
+    while True:
+        time.sleep(60)  # Check every minute
+        now = datetime.now()
+        session_timeout = CONFIG["server"]["session_timeout"]
+        cursor = database.DB_CONN.cursor()
+        cursor.execute("SELECT session_id, last_access FROM sessions")
+        rows = cursor.fetchall()
+        for session_id, last_access in rows:
+            if (
+                now - datetime.fromisoformat(last_access)
+            ).total_seconds() > session_timeout:
+                cursor.execute(
+                    "DELETE FROM sessions WHERE session_id = ?", (session_id,)
+                )
+        database.DB_CONN.commit()