fix(headless): defensive code against clientID access from relay

[olamothe]

https://coveord.atlassian.net/browse/KIT-3374

[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	205.9	206	0
commerce	300.3	300.4	0
search	374.8	374.9	0
insight	354.9	354.9	0
product-listing	267.5	267.5	0
product-recommendation	172.1	172.1	0
recommendation	218.9	218.9	0
ssr	367.4	367.5	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	15	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