Capture user_agent.original in Cloudflare integration

[AbhiPrasad]

@david said:

whatever our cloudflare integration does - it doesnt seem to capture user_agent.original (or http.user_agent) - trying to get this to exist on the mcp server so we can identify clients

[github-actions]

A PR closing this issue has just been released 🚀

This issue was referenced by PR #16793, which was included in the 9.35.0 release.