feat: add Socket.dev report URL to depscore output

[kapravel]

Add links to the full Socket.dev report page for each package when a score is returned. Users can click through for deeper analysis when scores raise concerns.

Why?

• Gives users a direct path to detailed Socket.dev analysis when scores warrant review
• Report URL is only shown when a score is found (omitted for "No score found" packages)

Public Changelog

Depscore tool now includes a link to the Socket.dev report page for each package with a score, enabling deeper analysis when scores raise concerns.

Checklist

• Is PR safe to revert (yes/no)?: yes

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Validation

• TypeScript type check passed
• Lint passed
• Unit tests passed (50/52; 2 integration tests require SOCKET_API_KEY, run in CI with secrets)
• buildSocketReportUrl unit tests added for all supported ecosystems

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