[code_scrapping]

TLDR: It's Postgres.

(I don't have any big opinions about the effort, I just wanted to hear what was the database chosen that was able to track all different data formats... and it could have been sexier, but yes - Postgres would do.)

[krausefx]

Author here - Yes, sorry for not putting that somewhere more visible. In my mind, the actual database running it was actually not relevant at all, it would have worked just as well with any database, including SQLite, as the basic structure, and size (~380,000 rows) could be handled by them.