Commit iniziale di eminuxCRM: CRM Rails con pipeline, campagne email e Docker.

Include autenticazione, progetti isolati, mail marketing HTML con SMTP, test A/B e editor WYSIWYG.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/models/product.rb

@@ -0,0 +1,13 @@
+class Product < ApplicationRecord
+  include Auditable
+
+  validates :name, :code, presence: true
+  validates :code, uniqueness: true
+
+  scope :active, -> { where(active: true) }
+  scope :ordered, -> { order(:position, :name) }
+
+  def to_s
+    name
+  end
+end