Permanently deletes the stored request body, response body, and any associated media files for a specific request. The request metadata (cost, timing, model, status) is preserved - only the payload data is removed.This operation is idempotent. Calling it on an already-purged request returns a success response with already_purged set to true.
This endpoint uses the native Lumenfall API path (/v1/requests), not the OpenAI-compatible prefix (/openai/v1).