fix(ci): use correct psycopg driver URL in generate-client

Change DATABASE_URL from postgresql:// to postgresql+psycopg:// to use
the psycopg v3 driver that's installed in the project dependencies.

Error was:
  ModuleNotFoundError: No module named 'psycopg2'

The project uses psycopg (v3), not psycopg2. SQLAlchemy needs the
postgresql+psycopg:// scheme to use the correct driver.

Related to CUR-29

🤖 Generated by Aygentic

Co-Authored-By: Aygentic <noreply@aygentic.com>

Author: amostt

.github/workflows/generate-client.yml

@@ -44,7 +44,8 @@ jobs:
         FIRST_SUPERUSER: admin@example.com
         FIRST_SUPERUSER_PASSWORD: just-for-generating-client
         # Supabase and Redis dummy values for client generation
-        DATABASE_URL: postgresql://postgres:password@localhost:5432/app
+        # Use postgresql+psycopg:// for psycopg v3 driver
+        DATABASE_URL: postgresql+psycopg://postgres:password@localhost:5432/app
         SUPABASE_URL: https://dummy.supabase.co
         SUPABASE_ANON_KEY: dummy-anon-key
         SUPABASE_SERVICE_KEY: dummy-service-key