Check Missing Royalty Splits

curl --request GET \
  --url https://server26-dot-royalti-project.uc.r.appspot.com/checklist/missingroyaltysplits \
  --header 'Authorization: Bearer <token>'

{
  "count": 23,
  "missingAssetSplits": [
    {
      "assetId": "a1b2c3d4-e5f6-7890-1234-567890abcdef",
      "assetTitle": "Incomplete Track",
      "isrc": "USRC17607839",
      "reason": "No splits configured"
    }
  ],
  "missingProductSplits": [
    {
      "productId": "p1b2c3d4-e5f6-7890-1234-567890abcdef",
      "productTitle": "Incomplete Album",
      "upc": "123456789012",
      "reason": "Missing artist splits"
    }
  ]
}