* fix(gateway): preserve work during recovered Node restarts
Let Unix Node recovery wrappers respect the existing Gateway stop budget.
Share startup-safe command classification and deadline facts, and resolve
managed restart intent against the live serving owner in its write
transaction with current update authority.
Preserve the existing public PID intent API, record format, and Windows
behavior. Keep cold lifecycle test preparation outside timed hooks.
Inspired by @ly85206559's wrapper-grace approach in #147054; this repair
is independently authored from main. Related: #146956. Windows cooperative
shutdown remains a follow-up.
* refactor(gateway): stabilize restart callback and test setup
Declare receiver-independent restart intent callbacks as arrows and retain typed signal spy handles for lint-safe assertions. Move cold lifecycle imports into test collection so worker preparation cannot consume timed setup hooks.
