This update fixes an unstable automated test related to Discuss message history. It helps ensure test results are consistent, reducing false failures during development and release validation.

Follow up on 2f3e6e9ea8e8f747f7f5f9210ddc6d147863f40f

The issue is still not fixed. Here is a new attempt.

This update makes Odoo use the same product account lookup method in more places, reducing inconsistencies between accounting, sales, point of sale, and stock flows. It is an internal cleanup that should make financial postings more reliable without changing day-to-day workflows.

**Description of the issue/feature this PR addresses:**
this PR is a refactor.
the product has a new function ``_get_product_accounts``, but this function is not called in all Odoo.

This PR fixes that.

kind regards.

CC : @mart-e 

CC : @OCA/accounting-maintainers

--
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

This change reverses a previous adjustment that moved mail-related tests to a later installation phase. The reversal is intended to prevent random build failures in automated validation, helping keep development pipelines reliable.

--
I confirm I have signed the CLA and read the PR guidelines at www.odoo.com/submit-pr

This update fixes several business-facing issues across Odoo, including cleaner price list formatting, more consistent payment records after cancellation, and faster accounting setup checks on large databases. It also improves payment testing links, video autoplay behavior, and progress bar editing stability.

Task: https://www.odoo.com/web#id=2154331&action=327&model=project.task&view_type=form&menu_id=4720
Pad: https://pad.odoo.com/p/r.f9c119c6725985b33681500e5119ce69