Scripts table should be created for each database/schema

[sunng87]

What type of enhancement is this?

Refactor

What does the enhancement do?

The scripts table, where we stored python scripts, should be created for each database/schema. This can either be done when creating the database/schema, or lazily created on first script register request.

Also we need a special naming pattern for these built-in tables, for example, to be prefixed with _ or gt_.

Implementation challenges

No response