Thirteen real fprintd-verify runs produced four matches and nine misses and no
rate, because nothing recorded which finger each run used. This script runs the
protocol -- N quick taps with the enrolled finger, then N with a different one
-- tells the user which finger and which tap they are on, and records the label
and the wall-clock latency from prompt to client result per tap. The daemon's
transcript has the frames; this has the labels. A loop change is measured
against this, one variable at a time.
