Non-documented property "etched" in SourceProducts data model

[grim7reaper]

Location of update needed

SourceProducts data model

What does the documentation look like?

Only foil and nonfoil properties are documented, but some instance also have an etched property. For instance in FlashyFliers_MOM.json:

{
  "finishes": [
    "nonfoil",
    "foil",
    "etched"
  ],
  "name": "Opt",
  "setCode": "STA",
  "sourceProducts": {
    "etched": [
      "52fca41e-cac5-5eb2-b107-0164e829d064"
    ],
    "foil": [
      "141e45d1-be58-5312-82ad-3cd774a567cb",
      "52fca41e-cac5-5eb2-b107-0164e829d064",
      "64143552-b778-5cdb-a29f-af955ef626e8",
      "7a22deb5-1740-5a47-af47-dcdc175c4b77",
      "b18d1de8-64f5-5aa6-bfd1-638520cc9c28"
    ],
    "nonfoil": [
      "141e45d1-be58-5312-82ad-3cd774a567cb",
      "64143552-b778-5cdb-a29f-af955ef626e8",
      "7a22deb5-1740-5a47-af47-dcdc175c4b77",
      "b18d1de8-64f5-5aa6-bfd1-638520cc9c28"
    ]
  },
  "uuid": "9f35aba6-72d9-565b-bb8b-2ba628282b2e"
}

What should the documentation look like?

Add the field in the type:

etched?: string[];

and the relevant documentation:

etched

A list of universal unique identifiers (v5) generated by MTGJSON for the [Sealed Product](https://mtgjson.com/data-models/sealed-product/) the etched card is found in.

- Type: `string[]`
- Introduced: `v5.2.2`

(not 100% sure about the Introduced: v5.2.2, I just copy-pasted from the other fields

Additional context

I'm using MTGJSON 5.2.2+20240814

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Also since we're talking about SourceProducts, I think the foil/nonfoil property should also be optional, no?