video1.0<iframe src="https://www.loom.com/embed/c01032e2e58b40a19394404b8f78d5a8" frameborder="0" width="1720" height="1290" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>12901720Loomhttps://www.loom.com12901720https://cdn.loom.com/sessions/thumbnails/c01032e2e58b40a19394404b8f78d5a8-fbb88442e6037d41.gif166.272A 3-minute runnable proof of database tuning and CI regression prevention. Same 50M-row events table in two schemas — naïve vs tuned. Scanned data drops from 1.8 GB to 6 MB, and a GitHub Actions job fails the build if the tuning regresses.