feat: make SQLAlchemy pool class configurable + add tracer to db.py a…

…nd dbview.py (#855)

* feat: add tracer to db.py and dbview.py

* fix: make lint

* fix: use a single `with` statement

Fix lint error: SIM117 Use a single `with` statement with multiple contexts instead of nested `with` statements

* fix: make format

* feat: make poolclass configurable

Default class is QueuePool with default engine options.

If a custom poolclass is set the default engine options are empty and must be set manually.

* fix: import queue pool in root

* fix: pyright