Aggiunge IMAP bounce e flag email non valide nel CRM.

Permette di leggere i bounce dalla stessa MailIdentity SMTP, aggiornare le email in anagrafica e saltare gli indirizzi invalidi nei mailing.

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

db/migrate/20260908160000_add_email_invalid_to_organizations_and_contacts.rb

@@ -0,0 +1,11 @@
+class AddEmailInvalidToOrganizationsAndContacts < ActiveRecord::Migration[8.1]
+  def change
+    add_column :organizations, :email_invalid, :boolean, default: false, null: false
+    add_column :organizations, :bounced_email, :string
+    add_column :contacts, :email_invalid, :boolean, default: false, null: false
+    add_column :contacts, :bounced_email, :string
+
+    add_index :organizations, :email_invalid
+    add_index :contacts, :email_invalid
+  end
+end

db/migrate/20260908184500_add_imap_settings_to_mail_identities.rb

@@ -0,0 +1,7 @@
+class AddImapSettingsToMailIdentities < ActiveRecord::Migration[8.1]
+  def change
+    add_column :mail_identities, :imap_host, :string
+    add_column :mail_identities, :imap_port, :integer, default: 993, null: false
+    add_column :mail_identities, :imap_enabled, :boolean, default: true, null: false
+  end
+end