perf(node-host): prewarm worker bundles (#124427)

perf(node-host): prewarm worker bundles (#124427)

* perf(node-host): prewarm worker bundles

* test(gateway): gate worker finalization responsiveness

* fix(node-host): negotiate bundle prewarming

* fix(protocol): refresh worker prewarm models

* fix(node-host): preserve prewarm upgrade compatibility