test(library): 维护 scope 终态按正式释放语义断言 released

ReleaseLibraryMaintenance 的真实终态是 state=released + released_at，原断言写成 verified 会误红；改为按生产语义核对 released/open。

cmd/worker/library_three_blockers_chain_test.go

@@ -447,7 +447,7 @@ func TestThreeBlockersVerifyChain(t *testing.T) {
 		Scan(&scopeState, &scopeIngress, &scopeReleased); err != nil {
 		t.Fatal(err)
 	}
-	if scopeReleased == nil || scopeState != "verified" || scopeIngress != "open" {
+	if scopeReleased == nil || scopeState != "released" || scopeIngress != "open" {
 		t.Fatalf("scope maintenance final state=%s ingress=%s released=%v", scopeState, scopeIngress, scopeReleased)
 	}
 	sentinelPG := tbUnrelatedSentinel(t, ctx, pool)