fix(deps): Update dependency alembic to v1.19.1

Author: cloudquery-ci[bot]

backend/requirements.txt

@@ -8,7 +8,7 @@ python-multipart==0.0.22
 # Database & ORM
 sqlalchemy==2.0.23
 psycopg2-binary==2.9.9
-alembic==1.12.1
+alembic==1.19.1
 
 # Authentication & Security
 python-jose[cryptography]==3.4.0