refactor: Centralize database session management in a shared dependency module

routes/dependencies.py

@@ -0,0 +1,13 @@
+from collections.abc import Generator
+
+from sqlalchemy.orm import Session
+
+from config.database import SessionLocal
+
+
+def get_db() -> Generator[Session, None, None]:
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()