V4.15.3

📦 Upgrade Guide

Image Updates

• Update the fastgpt-app (FastGPT main service) image tag to v4.15.3.
• Update the fastgpt-pro (FastGPT commercial edition) image tag to v4.15.3.

🐛 Fixes

1. Fixed rapid polling in the WeChat publishing channel when the WeChat API returns certain errors.
2. Restored the legacy type field for /v1/chat/completions responses when stream=false and detail=true.