fix(mcp): pass meta when listing tools

[tangchaojun-bytedance]

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Fixes #747

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[tangchaojun-bytedance]

mcp的listtools支持传递meta参数。
mcp-go支持meta需要升级go到1.25.6，但是在CI升级go版本时时can't find covdata，这是go的问题，https://github.com/golang/go/issues/75031#issuecomment-3195256688。可以将go升级到1.25.10/test文件修改go版本为1.25

[tangchaojun-bytedance]

给 MCP server 判断请求背景用的，比如：

这是哪个租户的请求
这是哪个 app / org / session
trace 链路信息是什么
是否需要进度通知
之前 eino-ext 只在真正调用工具时传 Meta：tools/call 会带 Meta
但 GetTools 会先调用：tools/list 获取工具列表
以前这个 tools/list 没带 Meta。