Forms: Preload initial inbox data and essential endpoints

[lezama]

Summary

Preloads the first page of inbox responses and essential endpoints for instant UI rendering.

Changes

• Preload initial inbox responses (first 20 items with full fields)
• Preload /wp/v2/types?context=view for entity type registration
• Preload /wp/v2/feedback/counts for status counts
• Preload /wp/v2/feedback/filters for filter options
• Normalize cache keys to match apiFetch requests (removes domain)
• Add required WordPress dependencies (wp-data, wp-core-data, wp-dom-ready)

Performance Impact

• Eliminates multiple initial network requests
• Data available immediately when React app loads
• Significantly reduces perceived load time

Related

Main PR: #45339

[github-actions]

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[github-actions]

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[jp-launch-control]

Code Coverage Summary

Coverage changed in 1 file.

File	Coverage	Δ%	Δ Uncovered
projects/packages/forms/src/dashboard/class-dashboard.php	17/105 (16.19%)	-5.89%	28 💔

Full summary · PHP report · JS report

_{If appropriate, add one of these labels to override the failing coverage check: Covered by non-unit tests Use to ignore the Code coverage requirement check when E2Es or other non-unit tests cover the code Coverage tests to be added later Use to ignore the Code coverage requirement check when tests will be added in a follow-up PR I don't care about code coverage for this PR Use this label to ignore the check for insufficient code coveage.}