feat(support): improve dedup by using key

[DexterYan]

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Description, Motivation and Context

• avoiding most JSON marshaling to check for duplicates, keep it for complicated one
• use UniqKey

Checklist

• [x] New and existing tests pass locally with introduced changes.
• [x] Tests for the changes have been added (for bug fixes / features)
• [x] The commit message(s) are informative and highlight any breaking changes
• [x] Any documentation required has been added/updated. For changes to https://troubleshoot.sh/ create a PR here

Does this PR introduce a breaking change?

• [ ] Yes
• [ ] No