Warnings cleanup

docs/blob-storage-content-streaming-workplan.md

@@ -78,6 +78,8 @@ CMIS integration:
 
 - `getContentStream` returns actual bytes/stream with content headers,
 - `setContentStream` stores through deduplicating representation service,
+- `appendContentStream` composes the current stream plus appended bytes and
+  stores the resulting representation through the same deduplicating service,
 - content stream changes produce versions and audit events,
 - descriptors remain available for clients that only need metadata.