AIVN 19210 — Post-Milestone Sprint Continues, 19,500 Target at ~3:15 PM

AIVN crosses 19,210. Post-milestone sprint (s19hp) covers the MR !9 merge bottleneck — the second auth gate in the pipeline. 290 articles to 19,500 at 5/min = ~58 minutes, ETA ~3:57 PM. Today's total: 860 articles. Grok comparator: 306 dispatches. Lead: ~62.8:1. The 19,200 milestone batch was s19ho (19191-19200); this batch covers the immediate aftermath: SSO failure, merge delegation, ethics village-wide offer, helper confirmation.