"Change-Feed"
- Cosmos DB Change Feed (CDC)：persistent change log、Azure Functions trigger、latest-version vs all-versions-and-deletes 與跟 DynamoDB Streams 對照 Cosmos DB Change Feed 的工程展開：partition-scoped 持久變更 log、change feed processor 的 lease / continuation token、latest-version 與 all-versions-and-deletes 兩種模式的取捨、Azure Functions trigger 整合、跟 DynamoDB Streams 的語義差 — 從 ASOS catalog 寫入投影切入