update

SYS/database.py

@@ -285,6 +285,9 @@ db = Database()
 _LOG_QUEUE: Queue[tuple[str, str, str]] = Queue()
 _LOG_THREAD_STARTED = False
 _LOG_THREAD_LOCK = threading.Lock()
+_LOG_WRITE_COUNT = 0
+_LOG_PRUNE_INTERVAL = 500   # prune every N successful writes
+_LOG_MAX_AGE_DAYS = 7       # keep logs for this many days
 
 
 def _ensure_log_db_schema() -> None:
@@ -323,6 +326,7 @@ def _log_worker_loop() -> None:
     """Background log writer using a temporary per-write connection with
     small retry/backoff and a file fallback when writes fail repeatedly.
     """
+    global _LOG_WRITE_COUNT
     while True:
         level, module, message = _LOG_QUEUE.get()
         try:
@@ -340,6 +344,14 @@ def _log_worker_loop() -> None:
                     cur = conn.cursor()
                     cur.execute("INSERT INTO logs (level, module, message) VALUES (?, ?, ?)", (level, module, message))
                     conn.commit()
+                    _LOG_WRITE_COUNT += 1
+                    if _LOG_WRITE_COUNT % _LOG_PRUNE_INTERVAL == 0:
+                        try:
+                            cutoff = (datetime.datetime.utcnow() - datetime.timedelta(days=_LOG_MAX_AGE_DAYS)).strftime("%Y-%m-%d %H:%M:%S")
+                            cur.execute("DELETE FROM logs WHERE timestamp < ?", (cutoff,))
+                            conn.commit()
+                        except Exception:
+                            pass
                     cur.close()
                     conn.close()
                     written = True