96856c42e0
set_property SEVERITY in the parent Vivado process does not propagate to the child process spawned by launch_runs. Write a drc_waivers_50t.tcl hook and attach it via STEPS.OPT_DESIGN.TCL.PRE so BIVC-1, NSTD-1, and UCIO-1 are demoted to warnings inside the impl_1 run context.