ENG-2490: Propagate session aborts to teammates (#13647)

* fix(core): propagate session abort to teammates

* fix(core): persist aborted teammate tasks as cancelled

* fix(core): settle teammate work on session abort

* fix(core): isolate replacement runs from stale aborts

* refactor(core): narrow teammate task status metadata

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Co-authored-by: abeatrix <beatrix@cline.bot>