fix(nodes): preserve cancelled turns when workers reject terminal eve…

fix(nodes): preserve cancelled turns when workers reject terminal events (#148181)

* fix(nodes): preserve cancelled turns when workers reject terminal events

Keep an accepted node turn cancellation separate from the physical worker failure when no result frame arrives. Preserve failure diagnostics, exact ownership, journal retry, and process cleanup before returning capacity.

Report standalone worker failures with the shared redacted CLI formatter and bounded output drain so Node does not dump bundled source or leave a failed worker alive with open handles.

* test(worker): isolate caught runtime entry exits