The 20A PSU ceiling was hardcoded and clamped user entries, which breaks
benches with a different supply. Now the sweep I limit field IS the max
input current allowed for the test environment: used verbatim as the
supply CC limit and as the step-rejection / measured-backstop ceiling.
Manual supply-current clamp removed; manual CC/CP load gate now checks
against the I limit field value. PSU_MAX_CURRENT_A is reduced to
INPUT_LIMIT_DEFAULT_A (initial field value only).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
