blockedAt: persist and return the block's start time, so a blocked row's age is readable without a per-row event read

BWI-74 basquetwi Backlog

bwi hub posts omit x-llmmsg-client, tripping the hub client-outdated backstop

BWI-73 basquetwi Backlog

kpi-report.py digest-integration polish for kpi-weekly-report.sh: (1) add explicit --markdown flag alias (default stdout already md); (2) off-vocab line as count/total (e.g. 14/47) for the digest health metric. Section anchors ## 1/2/3 already grep-stable.

BWI-9 basquetwi Backlog low