fix(deps): patch netlink-socket2 to support musl targets

Vendor netlink-socket2 to resolve compilation failures caused by direct struct-literal initialization of libc types on musl.

Cargo.toml

@@ -35,3 +35,10 @@ version = "0.4"
 
 [features]
 uci = ["dep:rust-uci"]
+
+[patch.crates-io]
+# netlink-socket2 0.3.0 uses struct-literal syntax for libc::msghdr/cmsghdr which
+# fails on musl (private __pad1/__pad2 fields, u32 vs usize for cmsg_len).
+# Remove this patch once a fixed version is published upstream.
+# Upstream PR: https://github.com/one-d-wide/netlink-bindings/pull/12
+netlink-socket2 = { path = "vendor/netlink-socket2" }