Good idea. I added a set rollup test in `RollupRunnableIntegrationTest` and that exposed a few bugs relating to how full-res preaggregated metrics were being serialized incorrectly.

Fixed in 329a39caac16ab2022e7b04bf2a27a625774d124, 27e5639e6fd0ce65e4b25a33f2e6619ff72c5157 and c5cc1f017a5d539c6f3d63486b57fc269b7f2e0c