* fix(channels): fence restart during service shutdown
* test(channels): fence restart during service stop
* test(channels): exercise restart after shutdown channel snapshot
* docs(channels): document service shutdown publication fence
* fix(channels): keep agent guidance within CI hard budget
* fix(channels): fence publication after shutdown completes
* test(channels): cover resume after completed service shutdown
* test(channels): mark direct-start fixtures as active services
* test(channels): mark direct-start fixtures as active services
* style(channels): format shutdown regression test
* fix(channels): drain channel startup completing after service stop
* test(channels): ensure late channel startup is drained after stop
* style(tests): format channel shutdown regression
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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
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