- Use netip.Addr instead of string IPs in the local resolver's
PeerConnectivity and PeerActivator interfaces; extract record
addresses as netip.Addr (v4-mapped forms unmapped) and convert to
string only at the peer.Status boundary.
- Scope warm-up to match-only (non-authoritative) zones so the
synthesized private-service records keep warming while plain
peer-name lookups in the authoritative peer zone no longer wake
every idle peer.
- Parse NB_DNS_LAZY_WARMUP_TIMEOUT once in the resolver constructor
instead of on every request, and log invalid values.
- Stop reusing engine.syncMsgMux on the DNS path: ConnMgr.ActivatePeer
is now safe for concurrent use (lazy manager pointer guarded by a
dedicated RWMutex; the manager itself is internally synchronized),
so network-map processing no longer blocks DNS resolution.
- Add SetPeerActivator to the dns.Server interface (no-op on the mock)
and drop the *dns.DefaultServer type assertion in the engine.
- Drop WireGuard wording from dns/local comments; the layer is
transport-agnostic.
Tests: authoritative zones never trigger warm-up; warm-up timeout env
parsing (valid/invalid/non-positive); extractRecordAddr unmaps
v4-mapped record data; dnsPeerActivator skips connected/unknown/
conn-less peers, returns on connect, and releases at the budget when
the peer stays idle; ConnMgr.ActivatePeer races the manager lifecycle
cleanly under -race.
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