_check_address now canonicalizes IPv4-mapped IPv6 addresses (e.g.
::ffff:169.254.169.254) to their embedded IPv4 target before the metadata
and non-unicast checks. Previously the mapped form was a distinct address
object absent from _METADATA_ADDRESSES with is_reserved=False/is_global=False,
so under allow_private=True it slipped past every check and the socket layer
still dialed the mapped IPv4 metadata endpoint. test_allow_private_does_not_
allow_metadata is parametrized over the plain and mapped spellings.
Also cast SafeAiohttpResolver.resolve's ResolveResult host/port to str/int to
satisfy aiohttp's TypedDict (fixes the two mypy errors in the strict-overrides
CI gate).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
