chore: import upstream snapshot with attribution

Sources/ContainerResource/Network/NetworkStatus.swift

@@ -0,0 +1,40 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2026 Apple Inc. and the container project authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===----------------------------------------------------------------------===//
+
+import ContainerizationExtras
+
+/// The runtime status of a network — the addresses assigned once the network
+/// plugin is active. Only present after the network has started.
+public struct NetworkStatus: Codable, Sendable {
+    /// The IPv4 subnet assigned to the network.
+    public let ipv4Subnet: CIDRv4
+
+    /// The IPv4 gateway address.
+    public let ipv4Gateway: IPv4Address
+
+    /// The IPv6 subnet assigned to the network, if IPv6 is enabled.
+    public let ipv6Subnet: CIDRv6?
+
+    public init(
+        ipv4Subnet: CIDRv4,
+        ipv4Gateway: IPv4Address,
+        ipv6Subnet: CIDRv6?
+    ) {
+        self.ipv4Subnet = ipv4Subnet
+        self.ipv4Gateway = ipv4Gateway
+        self.ipv6Subnet = ipv6Subnet
+    }
+}