[ddm, mg-lower, pt6] underlay membership sweep, admin v5, & mrib origination - #999

control: job assigned to worker 01M700QYM2Y1YM137G8ZCZG39F [factory aws, i-019a51448c80ad3a9] (queued for 1 m 7 s)
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task: starting task 0: "setup"
task: process exited: duration 4148 ms, exit code 0
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task: starting task 1: "rust-toolchain"
task: process exited: duration 16674 ms, exit code 0
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task: starting task 2: "authentication"
task: process exited: duration 16 ms, exit code 0
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task: starting task 3: "clone repository"
task: process exited: duration 1755 ms, exit code 0
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task: starting task 4: "build"
task: process exited: duration 529676 ms, exit code 0
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