Catapult_sqliteBackend that writes directly to a Sqlite database.
Creating the database is done via Writer.create or Writer.with_. Then Backend can be used to turn this Writer.t into a Tracing collector.
module Writer : sig ... endDB writer.
module Backend : sig ... endval backend_of_writer : Writer.t -> Catapult.backendval trace_collector_of_writer : Writer.t -> Trace_core.collectorTurn a writer into a Trace collector.