replace Redis with an embedded SQLite string->string KV store (group commit, in-tx events, SQL search)

internal/snapshot/export.go

@@ -24,7 +24,7 @@ type ExportOptions struct {
 	SourceHost string
 }
 
-// Exporter writes snapshot ZIPs from a live Redis store.
+// Exporter writes snapshot ZIPs from the live metadata store.
 type Exporter struct {
 	storage *storage.Client
 }