5f949a86e2
v8 Event session reuses across SendEvent (~10-16x amortization); register-once sufficient; session survived 25s idle; event reads stay gated (C2). Live-validated against wonder-sql-vd03. Gate decision: GREEN -> HistorianGateway Stage B1 (separate event-session pool for SendEvent) warranted. Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii