Diff two workflow revisions

curl --request GET \
  --url https://api-sandbox.featherhq.com/v1/workflows/{workflow_id}/revisions/diff \
  --header 'x-api-key: <api-key>'

{
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    "revision_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
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  },
  "target": {
    "revision_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "<string>"
  },
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    },
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        {
          "text": "<string>"
        }
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          "after": null
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          "before": null,
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        }
      ]
    },
    "policies": {
      "added": [
        "<string>"
      ],
      "removed": [
        "<string>"
      ]
    },
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                "text": "<string>"
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              {
                "text": "<string>"
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      ],
      "router": [
        {
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              {
                "text": "<string>"
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          },
          "before": null,
          "after": null
        }
      ]
    }
  },
  "graph_diff": {
    "summary": {
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      "nodes_removed": 0,
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      "context_vars_removed": 0,
      "context_vars_changed": 0,
      "escape_hatches_added": 0,
      "escape_hatches_removed": 0,
      "escape_hatches_changed": 0
    },
    "graph_meta": {
      "persona": {
        "segments": [
          {
            "text": "<string>"
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        ]
      },
      "system_prompt": {
        "segments": [
          {
            "text": "<string>"
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        ]
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    },
    "nodes": {
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            "<string>"
          ],
          "done_when_readable": "<string>",
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            {
              "canonical_key": "<string>",
              "display_name": "<string>",
              "produces_variables": [
                "<string>"
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            }
          ],
          "knowledge_bases": [
            {
              "kb_id": "<string>",
              "display_name": "<string>",
              "clearance_level": 123
            }
          ],
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          ],
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              {
                "label": "<string>",
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            ],
            "connecting_text": "<string>",
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            "max_retries": 1,
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          },
          "on_failure": "<string>",
          "condition_readable": "<string>",
          "approver_role": "<string>",
          "suspend_message": "<string>",
          "timeout_seconds": 123,
          "on_approve": "<string>",
          "on_deny": "<string>"
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      ],
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    },
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      ],
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}