previous

type Request struct {
	Name           string        // variable name
	Namespace      string        // FrogoDB namespace
	Ref            string        // source key for the reference entity (e.g., "standard.user_id")
	Retrieve       string        // source key for the value to retrieve
	Exclude        string        // source key for exclude matching (optional)
	FilterBy       []string      // additional grouping fields
	EventID        string        // current event ID (for dedup)
	MaxCount       int           // max entries in list (default 100)
	TTL            time.Duration // REQUIRED. Expiration for previous-event records.
	IncludeCurrent bool
}

type Result struct {
	Value any  // retrieved value from previous event
	Found bool // whether a matching previous event was found
}