v4.9.1

What's Changed

• refactor: optimized error handling by @TyperBody in #2020
• fix: deduplicate final chunk yield in Dify chatflow streaming by @Copilot in #2049
• feat: add support for username by @wangcham in #2047
• feat: model fallback chain (#2017) by @RockChinQ in #2018
• fix(market): sync plugin market UI improvements from Space by @RockChinQ in #2056
• fix: resolve security vulnerabilities in dependencies by @RockChinQ in #2059
• Feat/agentic rag and parser invoke api by @huanghuoguoguo in #2052
• Enhance Lark Bot Ability to Reply to Quoted Messages by @marunrun in #2043
• feat: Implement WebSocket long connection client for WeChat Work AI Bot by @fdc310 in #2054

Full Changelog: v4.9.0...v4.9.1