- ChunkIngestionController: /data/chunks → /data/executions (matches PROTOCOL.md endpoint the agent actually posts to) - ExecutionController: conditional on ClickHouse being disabled to avoid mapping conflict - Persist originalExchangeId and replayExchangeId from ExecutionChunk envelope through to ClickHouse (was silently dropped) - V5 migration adds the two new columns to executions table Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>