Library
No investigations, no rigid structure. Things that have been produced live in the project directory, and the Library is simply what is in there.
Saved things
reports/ inside the mounted project directory
Nothing saved yet. Run an AI Job and its report appears here - because the Library is the directory, not a database table.
Why this is the whole implementation
A project IS a directory. The Library needs no schema, no table and no object type - it
lists what the project has produced. Copy the folder and the Library comes with it.