Add project organization_id not null constraint

db/post_migrate/20241018090720_add_project_organization_id_not_null_constraint.rb

+# frozen_string_literal: true
+
+class AddProjectOrganizationIdNotNullConstraint < Gitlab::Database::Migration[2.2]
+  milestone '17.6'
+  restrict_gitlab_migration gitlab_schema: :gitlab_main_cell
+  disable_ddl_transaction!
+
+  def up
+    add_not_null_constraint :projects, :organization_id
+  end
+
+  def down
+    remove_not_null_constraint :projects, :organization_id
+  end
+end