Json deserialisation failing when reading back eventstore

[AndrewIOM]

When rebuilding the read model, there has been a regression whereby certain events that contain a tuple with an option type are failing to deserialise. May be related to changes in FSharpLu.Json.

example failure:

{
  "Imported": {
    "Id": {
      "TaxonId": "9f7a2a2a-8a18-4be4-8c4d-f45d88d54246"
    },
    "Group": "Angiosperm",
    "Identity": {
      "Species": [
        {
          "LatinName": "Aster"
        },
        {
          "SpecificEphitet": "subintegerrimus"
        },
        {
          "Scientific": "Trautv."
        }
      ]
    },
    "Parent": {
      "TaxonId": "47597ce4-8a0f-468c-a25e-b6523d24176b"
    },
    "Status": "Accepted",
    "Reference": {
      "Item1": "\"Reisen in Europa, Asien und Afrika 1:\", 161, 1847"
    }
  }
}

Types are at: https://github.com/AndrewIOM/gpp-cqrs/blob/master/src/Services/Core/GlobalPollenProject.Core/Taxonomy.fs

[AndrewIOM]

After investigation, it appears that FSharpLu has updated their algorithm for serialisation (compact mode) but included the legacy implementation in a Legacy module. If we switch to the legacy version, serialisation works again as expected for all types. Switching Compact.deserialize< ^T> to Compact.Legacy.deserialize< ^T> fixes the issue.