Jar.integratePreimages (delta : Dict Jar.ServiceId Jar.ServiceAccount)
  (preimages : Jar.PreimagesExtrinsic) (t' : Jar.Timeslot)
  (opaqueData : Array (ByteArray × ByteArray) := #[]) :
  Dict Jar.ServiceId Jar.ServiceAccount × Array (ByteArray × ByteArray)
Jar.integratePreimages
  (delta :
    Dict Jar.ServiceId Jar.ServiceAccount)
  (preimages : Jar.PreimagesExtrinsic)
  (t' : Jar.Timeslot)
  (opaqueData :
    Array (ByteArray × ByteArray) :=
    #[]) :
  Dict Jar.ServiceId Jar.ServiceAccount ×
    Array (ByteArray × ByteArray)

δ‡ : Integrate preimage data into service accounts. GP eq (12.35–12.38). For each (service_id, preimage_data) in E_P:

1. Hash the preimage data to get h = H(data)

2. If the service has a solicitation for (h, |data|), store the preimage

3. Expunge old preimage solicitations past D_EXPUNGE timeslots. Also accepts and returns opaque data so that preimage_info entries not promoted during accumulation can still be found and updated.