jetstream v2 in zig stream.waow.tech

powerloss-image: build natively; give the CI guest a real docker network pool master

The recipe hardcoded --platform=linux/arm64, which is invisible on an arm64 workstation and produces an unrunnable image on x86_64 CI: every RUN dies with 'exec /bin/sh: exec format error'. Build for the host. The guest also exhausted docker's default address pools mid-run, which then broke container setup for later steps. Configure an explicit 10.201.0.0/16 pool (256 networks) and prune leaked networks before the suites. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>


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