Add: dns leak detection

Cargo.lock

@@ -1059,6 +1059,9 @@ name = "ipnet"
 version = "2.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "469fb0b9cefa57e3ef31275ee7cacb78f2fdca44e4765491884a2b119d4eb130"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "ipnetwork"
@@ -3234,6 +3237,7 @@ dependencies = [
  "wtfnet-diag",
  "wtfnet-discover",
  "wtfnet-dns",
+ "wtfnet-dnsleak",
  "wtfnet-geoip",
  "wtfnet-http",
  "wtfnet-platform",
@@ -3271,6 +3275,7 @@ dependencies = [
 name = "wtfnet-discover"
 version = "0.1.0"
 dependencies = [
+ "hickory-proto",
  "mdns-sd",
  "serde",
  "thiserror 2.0.17",
@@ -3296,6 +3301,20 @@ dependencies = [
  "url",
 ]
 
+[[package]]
+name = "wtfnet-dnsleak"
+version = "0.1.0"
+dependencies = [
+ "hickory-proto",
+ "ipnet",
+ "pnet",
+ "serde",
+ "thiserror 2.0.17",
+ "tokio",
+ "tracing",
+ "wtfnet-platform",
+]
+
 [[package]]
 name = "wtfnet-geoip"
 version = "0.1.0"