v1.15.13b's base crept to 2506 MB (LAN-access script + updated entrypoint
+ apt drift), tripping the zero-headroom 2500 ceiling. smoke-base failed,
which cascaded into skipping build-variant-base AND promote-base-latest,
so base-latest never advanced. All functional checks passed — this is a
guardrail bump, not a real regression. base-<hash> and the omos/with-pi/
omos-with-pi/pi-only variants did publish on the fresh base in run 354.
pi
c71c03f0f1