Validate JSON data against a JSON Schema subset
https://agent-evidence-extractor.defcronyke.workers.dev/v1/json-schema-validateOverview
Submit one JSON object as data plus a root-object schema. Supports nested types, required fields, enums, bounds, and additional-property checks; unsupported validation keywords are rejected, so this is not full JSON Schema compliance. Returns record/property issue paths only and makes no model call. For a batch of records, use /v1/json-preflight.