Due to the False boolean being received as string 'False'...
The value is then not considered falsy, thus the call is being
always considered recursive...

Close T22

This should reduce the impact of vacuum on the directory table, as the
final entries are put in place as is instead of performing updates on
the actual table.

Create a single, unified, historized hierarchy, "entity", and associated
tables. Bump SQL revision.

Closes T3 until proven otherwise.

cosmetic change

returning the number of tuples in various tables

expose it through the Python layer