v0.1.0b5 — calibration fixes from the first live fleet run

Beta 5 — b4's mouse auto-calibration went to real hardware (GL-RM1PE ×2, V1.9.1) hours after release. The algorithm validated live — held-out residual 0.0106 of the screen (~17px at 1600×900) on a RHEL/GDM host, correction applied and visually confirmed — and the run surfaced two functional bugs, both fixed here. If you installed b4, upgrade: calibrations recorded no resolution, and on GL's on-demand streamer the correction was never applied via the CLI path. Details in the CHANGELOG.