pub fn extract_jsonpath(document: &Value, path: &str) -> Result<Value, String>Expand description
Extract a value from a JSON document using a simplified JSONPath expression.
Supports:
$– the root object$.field– a field access$.field.subfield– nested field access$.field[0]– array index
This is a minimal implementation for the aggregation plugin. A full JSONPath implementation (filter expressions, wildcards, etc.) would use a dedicated crate.