* test: focus assertions on behavioral evidence
Prune redundant and wording-coupled checks while retaining diagnostic, parser, recovery, and cleanup coverage.
* refactor: remove test-only wrappers and duplicate checks
Exercise production operations through test fixtures, remove unused adapters, and keep managed-member uncertainty guidance under its existing owner.
* test: focus process validation on diagnostic facts
* refactor: remove test-only runtime helpers
Move semantic evidence fixture setup out of runtime and remove unused Windows settle recovery helpers while checking configured defaults independently.
* test: focus artifact diagnostics on format facts
* test: verify retained cleanup guidance delivery
Retain process input and unexpected failure diagnostics through the shared error projector. Preserve filesystem causes and firmware validation issues, and mark unchanged invalid requests nonretryable.
Use typed stat settlement and parse unknown command failures without losing null or undefined rejection causes.
Refs #5397, #5401, #5402, #5642
morluto