Add Description Fields and Change Helptexts

[maxtaube]

Description

Please reference the Ticket description and attached Document for the Tickets in Jira.

• adds an inline helptext to the custom alert form name
• adds a description field to custom alert (creation form)
• adds api tests
• adds model updates + migrations
• removes deprecated function call

Issue No

• Fixes #PG-5068
• Fixes #PG-5021

Checklist

• [✔] Tested locally or on demo2/demo3?
• [✔/✖/NA] New test case added/updated?
• [✔] Are all newly added texts included via translation?
• [✔/✖/NA] Are text sanitized properly? (Eg use of v-text v/s v-html for vue)
• [✔] Version bumped?
• [✔] I have understood, reviewed, and tested all AI outputs before use
• [✔] All AI instructions respect security, IP, and privacy rules
• [✔/✖/NA] Documentation updated?

[lachiebol]

Not sure if this was ready for review? But in general LGTM 👍 Just a note around API documentation

Also curious, do we know what this new description will be used for? Currently it's only displayed in the edit/create pages. Not on the ticket but maybe something to check with PO

[lachiebol]

API changes look good :)

Apologies, missed this in the initial review

[lachiebol]

Need to add 5.2.6 - 2026-04-27 - Updated API documentation back in

Also we'll need to update the release date for 5.3.0. @AltamashShaikh could this go out today? Maybe @maxtaube can release this one if the PR looks all good

[AltamashShaikh]

@lachiebol Fixed the data, please check and reapprove

[lachiebol]

@AltamashShaikh Good to merge?

[AltamashShaikh]

@lachiebol If everything is working fine, yes 👍