[maintenance] no_change:4b17b9daa6361009

[github-actions]

PHP maintenance event

No maintenance edit is indicated by the retained evidence. The plan remains blocked pending a successful required check in an environment with writable temporary storage.

[loadinglucian]

Resolved by #41. Production canary run 30438380502 completed with action no_change, GO, all four investigation criteria passed, no unresolved items, and downstream exact-head validation completed successfully.