Register calls before awaiting prior process cleanup. Carry policy cancellation into both Node execution modes and retain each admission until its call settles. Track persistent calls during provider disposal as well.
Cover unchanged-mode temporary escalation and policy changes that return to the original mode while cleanup is pending. Document the admission guarantee.
Validation: 308 focused tests passed, one skipped; both changed source files have 100% coverage. Two built-runtime smokes, two selected Session snapshots, all 43 doc-sync gates, and typed lint passed.
Tianyi Cui
b9863a9e28