This improvement enhances the subscription payment reminder email template by ensuring the customer reference (subscription code) is properly included in the email context. This allows the email template to correctly display the subscription code when notifying customers about upcoming suspension, providing better clarity and personalization in payment reminder communications.

client_order_ref

The customer reference is needed to fill this value in "email_payment_reminder" template.

```xml
Your subscription <t t-out="ctx.get('code') or ''">CODE</t> is still valid but will be <strong>suspended</strong>

```

Forward-Port-Of: odoo/enterprise#54124
Forward-Port-Of: odoo/enterprise#53319

This update improves the error messaging when users enter incorrect login credentials for the Indian E-Way Bill system. Instead of showing just an error code "108", users will now see a clear, descriptive message "[108] Invalid login credentials." This makes it easier for users to understand what went wrong and take corrective action.

Before This PR:
--------------------
If the username and password are wrong, then it only displays the error "108".

After This PR:
------------------
If the username and password are wrong, then it displays the error.
"[108] Invalid login credentials."

task - 3304862

Forward-Port-Of: odoo/odoo#149305
Forward-Port-Of: odoo/odoo#120901