docs(api): align examples with exported signatures

[KimHyeongRae0]

Summary

• Update API reference examples to use exported function signatures that match the current package API.
• Clarify that schema and Open Graph helpers operate on resolved config and page entries.
• Refresh audit, citability, report, and platform-hint snippets so they are copy-pasteable.

Validation

• git diff --check main..HEAD
• npm run build

[vercel]

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