v3.1.1 — bootc-boot-smoke --rootfs flag Single-fix patch. Tier 4 verify-downstream from v3.1.0 surfaced that bootc-boot-smoke didn't pass --rootfs to BIB, and the bootc.diskimage-builder.rootfs label on stable tags isn't reliable. New rootfs input (default xfs) matches installer-anaconda-iso. This is the v3.x line settling: with v3.1.0 we proved Tier 4 fires correctly and validates against live consumers; v3.1.1 fixes the first real bug Tier 4 caught.