feat: 修复 AI 风险语义并隔离 Mock 数据

server-go/internal/database/migrate_test.go

@@ -100,4 +100,8 @@ func TestEmbeddedMigrationsIncludeBaseline(t *testing.T) {
 	if version != 1 {
 		t.Fatalf("expected baseline migration version 1, got %d", version)
 	}
+	next, err := driver.Next(version)
+	if err != nil || next != 2 {
+		t.Fatalf("expected risk assessment migration version 2, got %d (err %v)", next, err)
+	}
 }