Correct doc for peer_cert and add peer_cert_chain#272

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evgeni wants to merge 2 commits intoruby:masterfrom

evgeni:peer_cert_fixes

Commits on Feb 6, 2026

Correct the doc for peer_cert, it returns a single cert, not an array
evgeni
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Add peer_cert_chain to return the whole certificate chain
evgeni
committed