Ability to store the prefect database to a custom PostgreSQL schema

[francbartoli]

Describe the current behavior

At the moment there is no way to set a custom search_path in the connection string of the database. This is an hard constraint in certain circumstances and environments where databases are not allowed to be containerized and the database is unique and shared across different applications.

Describe the proposed behavior

I'd like to have a setting in the database settings PREFECT_API_DATABASE_SCHEMA='foo'

Example Use

No response

Additional context

No response