Reactivate ad-server source

{
  "id": "550199",
  "customerId": 4210,
  "tenantId": "tnt_acme_gam",
  "mcpUrl": "/mcp/",
  "a2aUrl": "/a2a",
  "adServer": { "type": "google_ad_manager", "networkCode": "12345678" },
  "serviceAccountEmail": "sa-4210@scope3-storefront.iam.gserviceaccount.com",
  "lastError": null,
  "lastErrorCode": null,
  "lastTestedAt": "2026-05-01T08:00:00Z",
  "provisionedAt": "2026-04-25T12:10:00Z",
  "deactivatedAt": null,
  "createdAt": "2026-04-25T12:05:00Z",
  "updatedAt": "2026-05-02T10:05:00Z",
  "inventorySync": null
}