[18.0][IMP] product_analytic: Analytic Distrinbution Model in product.template model

[P-H-Phuc]

• This implementation allows configuring the analytic distribution model directly on the product.template form.

• By default, the value is inherited from the analytic_distribution_model_ids of the first product variant.

• When modifying the analytic distribution on the product.template form:

  • If the template has more than one variant, no change is applied.

  • If it has only one variant, the change is synchronized to the variant’s analytic_distribution_model_ids.

• When creating a new product.template with analytic_distribution_model_ids and only one variant, the system automatically assigns these models to the variant by setting its product_id.