DIAG: instrument userButton mount path (do not merge) #27602

Job	Run time
Check Permissions	5s
Build Packages	1m 10s
Formatting \| Dedupe \| Changeset	1m 1s
Static analysis	3m 35s
Unit Tests (**)	1m 11s
Unit Tests (**)	1m 9s
Publish with pkg-pr-new	1m 33s
Integration Tests (localhost, chrome)	2m 29s
Integration Tests (ap-flows, chrome)	3m 2s
Integration Tests (generic, chrome)	10m 39s
Integration Tests (sessions, chrome)	2m 50s
Integration Tests (fastify, chrome)	2m 4s
Integration Tests (vue, chrome)	2m 36s
Integration Tests (sessions:staging, chrome)	3m 9s
Integration Tests (tanstack-react-start, chrome)	2m 24s
Integration Tests (billing, chrome)	5m 44s
Integration Tests (astro, chrome)	3m 17s
Integration Tests (quickstart, chrome, 16)	2m 38s
Integration Tests (custom, chrome)	2m 41s
Integration Tests (hono, chrome)	2m 14s
Integration Tests (nuxt, chrome)	2m 50s
Integration Tests (express, chrome)	2m 15s
Integration Tests (react-router, chrome)	2m 38s
Integration Tests (quickstart, chrome, 15)	2m 40s
Integration Tests (handshake:staging, chrome)	1m 57s
Integration Tests (handshake, chrome)	1m 58s
Integration Tests (nextjs, chrome, 16)	11m 5s
Integration Tests (machine, chrome)	7m 39s
Integration Tests (nextjs, chrome, 15)	12m 11s
Integration Tests (chrome-extension, chrome)	3m 53s
Integration Tests (cache-components, chrome, 16)	3m 34s
	1h 48m 11s

Provide feedback