Guard the globalThis gateway-state container and the survivor park/adopt
calls on the import.meta.hot literal (not the runtime hmrActive() helper),
so Vite dead-code-eliminates every HMR path in production. Prod now uses a
plain module-local singleton — no globalThis, no Symbol.for — and the
survivor module drops out of the bundle entirely. Verified: gatewayRegistryState,
gatewaySurvivor, and import.meta.hot are all absent from the prod build.
Removes the now-unused hmrActive() export.
Brooklyn Nicholson
cbea2acbb8