The update tightens internal checks so certain business rule constraints must use clear, valid names. This helps prevent configuration or upgrade issues in HR and payroll-related modules without changing day-to-day user workflows.

odoo/odoo#211222

The Indian payroll payment advice report now shows the final total in words and includes the cheque date alongside the cheque number. The payment advice wording was also updated, making the report easier to read and reference for payroll and banking processes.

- Added final total in words on the advice report.
- Included cheque date after the cheque number for better reference.
- Updated advice sentence.

task-4652034

Point of sale blackbox communication now uses a more flexible connection method that can fall back to websockets when long polling is unavailable. This improves reliability for Belgian fiscal devices and helps reduce connection interruptions during checkout.

We updated the way of contacting the blackbox by using the `iot_http` service instead of
the `iot_longpolling` one : this allows using the websocket as a fallback to the longpolling.

Community PR: odoo/odoo#212050
Task: 4824066

Belgian point of sale configurations using a blackbox are now easier to start and keep compliant. The system prompts users for missing national identification details, syncs those details between linked user and employee records, and automatically applies required rounding, receipt printing, preview, and fiscal category settings.

This commit introduces an easier user experience to start with the blackbox.

Changes:
    - If no insz or bis number when opening a certified session, it opens a modal for the user to add it to its account.
    - If an employee is linked to a user, a change of insz or bis number in one of the two will update the field in the other.
    - When linking a blackbox to a config, it will automatically create a rounding method (the classic belgian one) and link it to the config.
    - Automatic Receipt Printing and skip preview screen are checked by default when using a config with a blackbox.
    - Fiscal data category is now always in the limited categories when using a blackbox.

task-id: 4643331

Community PR: https://github.com/odoo/odoo/pull/206237

Refunds in Point of Sale are now consistently handled as floating, open orders across affected localization and compliance modules. This aligns enterprise add-ons with the updated refund flow, helping reduce inconsistencies during refunds and invoicing.

This commit adapts the enterprise modules to the new behavior of the refund flow.

Marc Demo's access rights have been restored across service-related demo data. This helps demo environments work as expected for helpdesk, field service, and planning scenarios.