Bare 'FROM ubuntu' was floating; recent rollover (ubuntu:latest = 25.04
'resolute') dropped libpcre3 in favour of libpcre2 and broke the build
with E: Unable to locate package libpcre3.
Pin to 24.04 (same as docker_kaspersky and docker_sep) so the build is
reproducible across rollovers.
test-data/ is 255 MB of public corpora (Yamato hayabusa-sample-evtx +
local run outputs) — too large to track. fetch-test-data.sh clones the
upstream on demand.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>