indexing

type Metadata struct {
	Source   string
	FileName string
	Size     int64
	ModTime  interface{}
}

type State struct {
	Ctx         context.Context
	FilePath    string
	Documents   <-chan *entity.Document
	Chunks      <-chan *entity.Chunk
	Vectors     []*entity.Vector
	Metadata    Metadata
	TotalChunks int
}