feat(scale): add additional properties

[Qwerios]

This adds a small number of additional details for the scale measurement. Specifically:

• haul zone information
• a haul reference number
• a product description

[Qwerios]

An example scale entry:

 {
  "journal_id": "64b6785b-da15-46f9-915d-b7ac4a55e98b",
  "entry_id": "1701addd-90fe-4b46-bb98-2bd2b327b85c",
  "entry_type": "device-measurement",
  "entry_datetime": "2025-04-15T00:00:00Z",
  "revision": "2025-04-15T00:00:00Z",
  "immutable": false,
  "device_id": "DEVICE_ID_STRING",
  "value": {
    "type": "SCALE",
    "scale": {
      "tow": {
        "activity_date_start": "2025-04-15T15:00:00Z",
        "activity_date_end": "2025-04-15T15:00:00Z",
        "sequence_number": 1,
        "reference": "HAUL_REF_001",
        "location_start": {
          "latitude": 54.1234,
          "longitude": 3.1234
        },
        "zone": {
          "economical_zone": "NLD",
          "fao_area": "27.4.c",
          "fao_subarea": "4",
          "fao_division": "c",
          "ices_rectangle": "35F6",
          "effort_zone": "A",
          "regional_body": "NEAFC"
        },
        "fishing_gear": {
          "code": "DRB",
          "mesh_size": 80
        }
      },
      "category": "FISH",
      "product": "COD",
      "product_description": "Unsorted cod bits",
      "processed": {
        "fish_presentation": "WHL",
        "fish_state": "FRO",
        "package_type": "CT",
        "number_of_packages": 4,
        "average_package_weight": 250,
        "package_labels": [
          "LABEL1",
          "LABEL2"
        ],
        "fish_freshness": "A",
        "conversion_factor": 1
      },
      "weight": 1000
    }
  }
}

EDIT: Updated to re-use tow schema