This update simplifies how accounting documents move through their lifecycle by replacing older workflow mechanics with direct actions in invoices, payments, refunds, and bank reconciliation. It helps make accounting behavior more reliable and easier to maintain, while also updating related tests and demo data to match the new process.

Task: https://www.odoo.com/web?#id=27198&view_type=form&model=project.task&menu_id=5200

Odoo now better detects and processes bounced emails, helping teams identify messages that did not reach recipients. CRM opportunities gain visibility into bounce activity, while underlying mail handling was cleaned up to support more reliable future email processing.

The marketing campaign module was simplified by removing its old workflow mechanism as part of a broader rework. This reduces outdated behavior and helps prepare the module for future changes, with a small fix included to avoid a migration issue.

odoo task : https://www.odoo.com/web#id=27871&view_type=form&model=project.task&action=333&active_id=131&menu_id=

The repair process has been cleaned up by removing an older internal workflow mechanism. This makes the repair module easier to maintain while keeping the business process clearer and more reliable for future updates.

odoo task : https://www.odoo.com/web#id=27205&view_type=form&model=project.task&action=333&active_id=248&menu_id=5195

The payroll module no longer relies on its older workflow mechanism and now handles payslip status changes directly in code. This should make payroll behavior easier to maintain and more consistent, with limited visible change for everyday users.

remove workflow from hr_payroll

odoo task : https://www.odoo.com/web#id=27201&view_type=form&model=project.task&action=333&active_id=248&menu_id=5195

The time off module now handles leave request status changes directly in the application instead of relying on an older workflow mechanism. This makes approvals and follower notifications more reliable, and also fixes a related calendar issue that could break tests.

- Fix a bad call in calendar (made a test fail in hr_holidays)
- Remove workflows from the hr_holiday module and replace it by python methods.

odoo task : https://www.odoo.com/web#id=27200&view_type=form&model=project.task&action=333&active_id=248&menu_id=4720 
pad : https://pad.odoo.com/p/openerp-project.task-5OOMFN4R7D

The accounting app no longer relies on the old workflow mechanism for invoice and payment status changes, using direct application logic instead. This should make invoicing behavior easier to maintain and more reliable, including correctly marking invoices as paid.

Workflow removed, replaced by python methods.

odoo task: https://www.odoo.com/web#id=27198&view_type=form&model=project.task&action=333&active_id=248&menu_id=4720