Expose db change batches over control

README.md

@@ -89,7 +89,8 @@ The bootstrap implementation provides:
   `cleanup`, `list`
 - local DB resource registration: `geth db add <name> <path>` and
   `geth db status <name>` with schema and `crsql_changes` metadata; the DB
-  crate can extract typed local `crsql_changes` batches for future sync
+  crate and daemon can extract typed local `crsql_changes` batches through
+  `geth db changes <name>` for future sync
 - local SQLite-backed KV commands: `geth kv create/set/get`
 - local JSON document commands: `geth document create/status/set/get`
 - local daemon-lifetime pubsub snapshots: `geth pubsub pub/sub`