curl --request GET \
  --url https://api.mnemom.ai/v1/checkpoints/{checkpoint_id}/inclusion-proof

{
  "checkpoint_id": "<string>",
  "leaf_hash": "<string>",
  "leaf_index": 123,
  "siblings": [
    {
      "hash": "<string>",
      "position": "left"
    }
  ],
  "root": "<string>",
  "tree_size": 123,
  "verified": true
}