feat(mini): add compact native EasyTier client (#2479)

Add a native EasyTier proof-of-concept binary with TCP and UDP
transports, TUN, UDP hole punching, AES-GCM, and a read-only RPC
portal.

Introduce a release-derived mini profile and musl linker policy so
x86_64, big-endian MIPS, and little-endian MIPS stay below the strict
5,000,000-byte target without UPX.

easytier/src/instance/runtime_host/magic_dns.rs

@@ -5,10 +5,7 @@ use tokio_util::{sync::CancellationToken, task::AbortOnDropHandle};
 
 use crate::common::global_ctx::ArcGlobalCtx;
 #[cfg(feature = "magic-dns")]
-use crate::{
-    common::config::ConfigLoader as _,
-    instance::dns_server::{MAGIC_DNS_FAKE_IP, runner::DnsRunner},
-};
+use crate::instance::dns_server::{MAGIC_DNS_FAKE_IP, runner::DnsRunner};
 
 #[derive(Default)]
 pub(super) struct MagicDnsRuntime {
@@ -30,7 +27,7 @@ impl MagicDnsRuntime {
         tun_dev: Option<String>,
         tun_ip: Ipv4Inet,
     ) -> Self {
-        let active = global_ctx.config.get_flags().accept_dns.then(|| {
+        let active = global_ctx.get_flags().accept_dns.then(|| {
             let mut runner = DnsRunner::new(
                 packet_plane,
                 global_ctx,