fix(backend): harden machine-token verification and redact debug-logged tokens #29105

Job	Run time
Check Permissions	8s
Formatting \| Dedupe \| Changeset	58s
Build Packages	1m 26s
Static analysis	1m 19s
Publish with pkg-pr-new	55s
Unit Tests (**)	2m 50s
Unit Tests (**)	2m 34s
Integration Tests (express, chrome)	2m 2s
Integration Tests (tanstack-react-start, chrome)	1m 39s
Integration Tests (handshake, chrome)	1m 42s
Integration Tests (ap-flows, chrome)	1m 55s
Integration Tests (sessions:staging, chrome)	2m 39s
Integration Tests (nuxt, chrome)	2m 24s
Integration Tests (handshake:staging, chrome)	1m 50s
Integration Tests (react-router, chrome)	2m 2s
Integration Tests (sessions, chrome)	2m 21s
Integration Tests (localhost, chrome)	2m 32s
Integration Tests (generic, chrome)	5m 35s
Integration Tests (quickstart, chrome, 15)	3m 6s
Integration Tests (astro, chrome)	3m 22s
Integration Tests (billing, chrome)	4m 44s
Integration Tests (custom, chrome)	2m 34s
Integration Tests (nextjs, chrome, 15)	5m 46s
Integration Tests (fastify, chrome)	1m 44s
Integration Tests (hono, chrome)	2m 5s
Integration Tests (nextjs, chrome, 16)	5m 39s
Integration Tests (machine, chrome)	5m 1s
Integration Tests (vue, chrome)	1m 58s
Integration Tests (quickstart, chrome, 16)	2m 20s
Integration Tests (chrome-extension, chrome)	2m 0s
Integration Tests (cache-components, chrome, 16)	1m 58s
	1h 19m 8s

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