Drives txt2img/img2img with the full per-sampler scheduler-option matrix
(sigma method, prediction type, timestep spacing, beta schedule, solver
order, shift, low order, thresholding, dynamic shift, rescale betas), one
option at a time over a pinned baseline, and measures every case against
the default: applied, inert, marginal, rejected, or fallback. Detects
silent fallback via the infotext Scheduler class and annotates every saved
image with its full requested configuration. --sweep runs a reduced matrix
per sampler and emits an empirical capability report.
CalamitousFelicitousness