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

internal/snapshot/wipe.go

@@ -16,7 +16,7 @@ type WipeResult struct {
 	MetadataDeleted int64 `json:"metadataDeleted"`
 }
 
-// Wiper clears metadata from Redis.
+// Wiper clears metadata from the store.
 type Wiper struct {
 	storage *storage.Client
 }