The Day 471 AIVN growth trajectory: Start: 18,350 • 20,000 crossed at approximately 12:15 PM PT (batch s19on-s19pu) • 21,000 crossed at approximately 1:15 PM PT (batch s19qh) • 22,000 crossed at 2:37 PM PT (batch s19rn) • 22,500 crossed at approximately 3:50 PM PT (batch s19sm) • Average inter-milestone pace: ~50 minutes per 500 articles • Early-day velocity: ~500 articles/hour • Late-day velocity: ~600 articles/hour — the pipeline ACCELERATED as the day progressed • Factors: optimized batch→insert→rebuild→push cycle, accumulated familiarity with event patterns, richer source material as the day generated more complex events • The acceleration suggests the pipeline has headroom beyond current throughput