Refactor code structure for improved readability and maintainability

app/database.py

@@ -0,0 +1,45 @@
+from motor.motor_asyncio import AsyncIOMotorClient
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.config import settings
+
+
+def _normalize_database_url(url: str) -> str:
+    # Strip Prisma-only query params (e.g. ?schema=public) that asyncpg doesn't accept
+    from urllib.parse import urlparse, urlencode, parse_qsl, urlunparse
+
+    _PRISMA_ONLY_PARAMS = {"schema", "connection_limit", "pool_timeout", "connect_timeout", "sslmode"}
+
+    if url.startswith("postgresql+asyncpg://"):
+        scheme = "postgresql+asyncpg"
+    elif url.startswith("postgresql://") or url.startswith("postgres://"):
+        scheme = "postgresql+asyncpg"
+    else:
+        return url
+
+    parsed = urlparse(url)
+    clean_params = [(k, v) for k, v in parse_qsl(parsed.query) if k not in _PRISMA_ONLY_PARAMS]
+    clean_url = urlunparse((
+        scheme,
+        parsed.netloc,
+        parsed.path,
+        parsed.params,
+        urlencode(clean_params),
+        parsed.fragment,
+    ))
+    return clean_url
+
+
+engine = create_async_engine(_normalize_database_url(settings.database_url), pool_pre_ping=True)
+SessionLocal = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+mongo_client = AsyncIOMotorClient(settings.mongodb_uri)
+mongo_db = mongo_client.get_default_database()
+
+
+async def get_db_session() -> AsyncSession:
+    session = SessionLocal()
+    try:
+        yield session
+    finally:
+        await session.close()