chore: add deprecation note for DNT

[samisayegh]

The PR adds a deprecation note to remove DNT as part of the next major release.
The decision is captured here. The main drivers were:

• DNT is an outdated standard. Newer standards like GPC have been introduced. We don't believe it's Coveo's role to update libraries to adhere to the latest standards?
• Privacy standards differ around the world. Baking a single privacy stance into Coveo's libraries and apis will be overly restrictive in certain geographies.

Aside
I tried to adjust the logic in headless to only apply DNT if the analyticsMode is legacy. However, this required changing an action to an thunk. The signature change created multiple typescript errors, and so seems like it's breaking. I changed course to add a deprecation note instead. With the v3 release around the corner, it seems less risky to simply remove the doNotTrack function rather than making a signature change.

[olamothe]

I tried to adjust the logic in headless to only apply DNT if the analyticsMode is legacy.

Here is what I would propose to try:

• In configuration-actions -> updateAnalyticsConfiguration() -> remove the doNotTrack() function call.
• In engine.ts -> getUpdateAnalyticsConfigurationPayload(), call doNotTrack() only if configuration.analytics.analyticsMode === 'legacy'

When you look at the full logic, calling doNotTrack() in updateAnalyticsConfiguration() is a bit of a suspender with belt thingy.

[developer-experience-bot]

Pull Request Report

PR Title

✅ Title follows the conventional commit spec.

Live demo links

• Storybook

• Playwright report

Bundle Size

File	Old (kb)	New (kb)	Change (%)
case-assist	202.8	202.9	0
commerce	285.9	285.9	0
search	367.4	367.4	0
insight	347.7	347.7	0
product-listing	262.2	262.2	0
product-recommendation	171.9	171.9	0
recommendation	215.8	215.8	0
ssr	360.2	360.2	0

SSR Progress

Use case	SSR (#)	CSR (#)	Progress (%)
search	39	44	89
recommendation	0	4	0
product-recommendation	0	10	0
product-listing	0	13	0
case-assist	0	6	0
insight	0	27	0
commerce	0	7	0

Detailed logs

search : buildInteractiveResult
search : buildInteractiveInstantResult
search : buildInteractiveRecentResult
search : buildInteractiveCitation
search : buildGeneratedAnswer
recommendation : missing SSR support
product-recommendation : missing SSR support
product-listing : missing SSR support
case-assist : missing SSR support
insight : missing SSR support
commerce : missing SSR support

[samisayegh]

Made the changes @olamothe. Removing doNotTrack from the action simplifies the problem, but is a change in behavior. Are we ok with this?