GET /v2/custodian-authorities/:id

Fetch one custodian authority — including its current status and the
linked accounts / depositories.

Path params:
  id (required) — Custodian-authority identifier (UUID).

Response (200 OK):
{
  "data": {
    "id": "string (UUID)",
    "type": "custodian-authority",
    "attributes": {
      "status":             "string — see lifecycle on the resource page",
      "pendingFiles":       [ "string" ],
      "linkedDepositories": [
        {
          "depositoryNumber": "string",
          "depositoryId":     "string or null",
          "status":           "in-progress | active"
        }
      ],
      "linkedAccounts": [
        {
          "accountNumber": "string",
          "accountId":     "string or null",
          "status":        "in-progress | active"
        }
      ]
    },
    "relationships": {
      "custodian":         { "data": { "type": "custodian", "id": "string" } },
      "custodianAuthFlow": { "data": { "type": "custodian-auth-flow", "id": "string" } },
      "legalEntity":       { "data": { "type": "legal-entity", "id": "string" } }
    }
  }
}