chore(deps): bump actions/setup-node from 4 to 7 #56

Job	Run time
Gate (skip full CI for version PRs?)	2s
🌐 Test (DOM)	46s
🧩 Workspace deps	15s
🧰 Build	28s
🔬 Test	35s
💅 Format	16s
🔗 Doc links	7s
✅ Typecheck	1m 10s
📖 Docs site (Blume)	1m 10s
🛡 Audit	15s
🕵 Lint	15s
📏 Bundle size	28s
📦 Pack validation	50s
CI complete	4s
	6m 41s

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