Show highest and lowest price when viewing graph

[Crinibus]

Tech scraper
visualize_data.py:

• When viewing graph, then show highest and lowest price for each domain somewhere on the graph, maybe under the title.
• Maybe also the median or related "stats".

[Crinibus]

Maybe add an argument like --stats to show stats for the specified product(s) with e.g. --id or --name instead of when visualizing graphs