The blog post https://frerich.github.io/postgres/elixir/2025/11/14/postgres-large-objects-and-elixir.html discusses a lesser-known facility of PostgreSQL for storing files up to 4TB straight in the database: Large Objects. What is it, how does it work, when is it a good fit? And how does the new library https://hexdocs.pm/pg_large_objects/readme.html work for using Large Objects in Elixir applications?