1.3.26 和 1.6.69 之间的 rollup_join 回归 (多立方体,零测量查询),当前版本 1.7.35 也存在此问题 — 与 #10384 有关

Describe the bug

A multi-cube, multi-data-source rollupJoin pre-aggregation that matched correctly on 1.3.26 stops matching after upgrading to 1.6.69, throwing the cross-data-source error even though a rollupJoin covering exactly those cubes/dimensions is defined. The query itself is unchanged between versions — only the Cube.js version changed.