feat: add origin region for hardware provenance

[taleodor]

This PR adds origin notion to track regional provenance of hardware components. Origin can be placed on a component level or a party level.

Proposed shape:

"origin": {
  "basis": "number of parts",
  "origins": [ { "originCode": "CA", "percentage": 0.7 } ]
}

[taleodor]

Updated shape based on HBOM group meeting of 2026-07-07:

"origins": [
  {
    "basis": "number of parts",
    "distribution": [
      { "isoCode": "CA", "percentage": 70 },
      { "isoCode": "US", "percentage": 30 }
    ]
  },
  {
    "basis": "manufacturing cost",
    "distribution": [ { "isoCode": "CA", "percentage": 100 } ]
  }
]