feat(tracking): add home artwork item impression events (NWFY and art…

[nickskalkin]

The type of this PR is: Feat

This PR solves ONYX-2118

Description

Builds on top of where we introduce home page rails impression tracking.

Adds item_viewed impression tracking for artwork cards using the same dwell/visibility behavior as railViewed.

This tracks artwork impressions in:

• Home: New Works for You
• Home: We Think You'll Love
• /recommendations/artworks artwork grid

Details

• Extracts shared dwell-based impression logic so rail and item impressions use the same observer behavior.
• Adds a reusable ArtworkItemImpression wrapper for artwork card impressions.
• Keeps home tracking scoped to the two rails
• Adds /recommendations/artworks impressions tracking

[relativeci]

#8432 Bundle Size — 8.93MiB (+0.1%).

0c7db47(current) vs 82b9818 main#8427(baseline)

Warning

Bundle contains 29 duplicate packages – View duplicate packages

Bundle metrics   4 changes 2 regressions

	Current #8432	Baseline #8427
Initial JS	2.89MiB(~+0.01%)	2.89MiB
Initial CSS	0B	0B
Cache Invalidation	97.44%	97.44%
Chunks	111	111
Assets	114	114
Modules	5617(+0.16%)	5608
Duplicate Modules	659(+0.46%)	656
Duplicate Code	5%(+0.4%)	4.98%
Packages	248	248
Duplicate Packages	28	28

Bundle size by type   1 change 1 regression

	Current #8432	Baseline #8427
JS	8.7MiB (+0.11%)	8.69MiB
Other	234.14KiB	234.14KiB

Bundle analysis report Branch nickskalkin/home-artworks-impres... Project dashboard

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