SQLite (infer.Backend.Payloads.SQLite)

val serialize : 
  t ->
  old_pulse_payload:Sqlite3.Data.t option ->
  Sqlite3.Data.t list

serialize payloads, but gets an old Pulse's payload to merge, which was pre-existing in DB

val lazy_load : proc_uid:string -> t

load each payload lazily

val deserialize_payload_opt : Sqlite3.Data.t -> 'a IStdlib.SafeLazy.t option

use to deserialize the data from one column for a particular payload id; callers are responsible for casting the result to the appropriate payload option SafeLazy.t type