Pass source: to the Langchain::Chunk

[andreibondarev]

No description provided.

[jjimenez]

If I pass in an array, each path might have it's own metadata / source. I would like to see this be able to take a string or a hash in the array. I hope this suggestion helps!

Suggested change

	options[:source] ||= path.to_s
	if path.is_a?(Hash)
	raise ArgumentError "Path hashes must have keys :path, :source" unless (path.keys & [:path, :source] == [:path, :source])
	options[:source] ||= path[:source]
	path = path[:path]
	end
	raise ArgumentError "Paths must be strings or hashes with keys :path, :source" unless path.is_a?(String)
	options[:source] ||= path.to_s