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

control: job assigned to worker 01M700QZP0XFYK40ZE35SV7J93 [factory aws, i-05b93f273e1e1c35d] (queued for 1 m 17 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 17146 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 1523 ms, exit code 0
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task: starting task 4: "build"
task: process exited: duration 176992 ms, exit code 0
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|W| uploading: /work/rib.log (1178 bytes)
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