snapshot

type Options struct {
	From   string
	Out    string
	Spread time.Duration // 0 = keep source timestamps
	Scale  int           // target issue count; ≤ source count means no cloning
	Seed   int64         // reserved for determinism; algorithm itself is seed-stable
	Force  bool
	Now    time.Time
}

type Result struct {
	Path      string
	Issues    int
	Comments  int
	Changelog int
	Spread    time.Duration
	Scale     int
	Bytes     int64
}