chore: pivot plan to Logto OIDC integration

Agent-Logs-Url: https://github.com/christianlouis/dmarq/sessions/b448f585-7646-40f8-ae2d-9986c361e3fd

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

backend/app/core/database.py

@@ -1,9 +1,10 @@
 import os
-from typing import Generator
+from typing import AsyncGenerator, Generator
 from urllib.parse import urlparse, urlunparse
 
 from sqlalchemy import create_engine
 from sqlalchemy.engine import make_url
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy.orm import sessionmaker