dd6bc1dcdb
1. Fix missing spaces in cron job wake prompt string concatenation. Python implicit string concatenation produced: "...scheduled taskProceed..." and "...conversation.After..." which sent garbled instructions to the LLM agent, causing unreliable cron job execution. 2. Replace deprecated datetime.utcnow() with datetime.now(datetime.timezone.utc) in JWT generation. utcnow() is deprecated since Python 3.12 and returns naive datetime which can cause incorrect token expiry on non-UTC systems. Closes #6103 Closes #6165 Co-authored-by: easonysliu <easonysliu@tencent.com>