Why: the adoption PR is reviewed and its candidate HEAD passed CI; the card closure is folded into the PR so no separate close PR is needed. Evidence: CI GATE on 19e86b5150e019e45f86ee9a97c6dfa153654d06; independent Review REPLAY (codex exec --ephemeral(fresh_session=true,session id not-observable)VERDICT: APPROVE,无阻塞项). Impact: task card only (moved to .task/archive/). Refs: https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Backend/pulls/208