Make telemetry not write to the filesystem

[philippemnoel]

What
That is a requirement for pg_lakehouse, and we should probably do it for pg_search too, while we're at it. Specifically we need the UUID file to not be written as a file to the filesystem.

Why
This way there truly is no filesystem access need for pg_lakehouse.

How
Write it to a table in the paradedb schema

[neilyio]

After some investigation, we're going to keep the filesystem approach. Trying to store the UUID in a database is tricky in a bgworker, because we don't really know what database to connect to.