Budget line help text has been clarified so users can better understand key budget fields. Revenue budgets now also hide commitment percentage information that is not relevant, reducing confusion for finance teams.

Before this commit:
- The budget line tooltips were unclear for some fields.

After this commit:
- The budget line tooltips have been updated for better clarity.

Task-4120878

The Helpdesk forum walkthrough now starts with a sample forum post already in place. This makes the guided tour more reliable and helps prevent failures caused by missing demo content.

The Helpdesk forum tour relies on the forum containing at least one post.
This PR manually creates a post in python before launching the tour.

Task-4143944