Retrieve vector store

{
  "id": "vs_abc123def456",
  "object": "vector_store",
  "created_at": 1711644800,
  "name": "product-docs",
  "usage_bytes": 1024000,
  "file_counts": {
    "in_progress": 0,
    "completed": 3,
    "failed": 0,
    "cancelled": 0,
    "total": 3
  },
  "status": "completed",
  "last_active_at": 1711731200,
  "expires_after": null,
  "expires_at": null,
  "metadata": {}
}