fix: handle multi-address lookups for WKD on Node 20+

[uniejo]

Node 20+ calls the connect-time lookup with all: true (autoSelectFamily), and the resolver then returns an array of addresses. The lookup read .address of that array, so every WKD fetch failed with ERR_INVALID_IP_ADDRESS and the private address check was skipped.

All addresses are now requested from the resolver and each one is checked before any is used, then returned in the form Node asked for.

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