code: def upgrade() -> None:
      op.create_table(
          "workspaces",
          sa.Column("id", sa.Uuid, primary_key=True),
          sa.Column(
              "name", sa.String, nullable=False, unique=True, index=True
          ),
          sa.Column("inserted_at", sa.DateTime, nullable=False),
          sa.Column("updated_at", sa.DateTime, nullable=False),
      )
  
imports: import sqlalchemy
  from alembic import op
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types