chore(book): add note on role of arbitrary data storage

coriolinus · coriolinus · commit 3a3b81587570 · 2026-03-30T10:27:37.000+02:00
diff --git a/cc-book/modules/ROOT/pages/transactions.adoc b/cc-book/modules/ROOT/pages/transactions.adoc
@@ -79,3 +79,5 @@ The context provides two methods for storing a single blob of arbitrary bytes in
 await ctx.setData(bytes)
 const bytes = await ctx.getData()
 ----
+
+These were implemented for the purpose of checkpointing during initial sync / batch decryption, but are not limited to that use.
