V4.14.16

Upgrade Guide

1. Update image tags

• Update fastgpt-app (FastGPT main service) image tag to: v4.14.16
• Update fastgpt-pro (FastGPT commercial) image tag to: v4.14.16

⚙️ Optimizations

1. Embeddings now support base64-encoded response values.

🐛 Bug Fixes

1. Fixed helper-bot prepending an Error~ prefix to its output.
2. Fixed the Alibaba Cloud OSS copy API.