The container job picked `sh -e {0}`, and sh on eclipse-temurin:jammy is
dash. Every `set -euo pipefail` step failed on line 2 with "Illegal option
-o pipefail" before running a command, so unit-tests and vectors-head went
red without compiling anything.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>