chore(core): Refactor utilities to reduce size (*.min.mjs) by -50B gzip'd

[kitten]

• Simplify dedupExchange logic
• Prevent onPush in fetch for production environments
• Replace several for-loops with for-of loops
• Use Set in collectTypes
• Remove .some from formatNode

I'm explicitly not adding a changeset, since it doesn't actually affect the output code and to not pollute the eventual changelog with irrelevant entries.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 59101a0

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