Contract validation

Captured JSON responses can be matched by URL and checked against JSON Schema. Validation is observational: the application still receives the response, while WebProbe reports every schema error.

{
  "validate": {
    "responses": [
      {
        "url": "**/api/products",
        "schema": {
          "type": "object",
          "required": ["products"],
          "properties": { "products": { "type": "array" } }
        }
      }
    ]
  }
}