* test: reuse isolated mobile bundle fixtures for verifier checks
* ci: run PR unit shards on ARM and overlap independent web builds
* docs: record controlled CI overlap and runner measurements
* test: observe WebRTC packets with the host clock
* ci: isolate Windows installer CIM probe from native test load
* docs: record native probe scheduling validation
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Co-authored-by: m4air <m4air@m4airs-Air.localdomain>