feat: add nix dependency and enhance socket permissions handling

Cargo.lock

@@ -2029,6 +2029,18 @@ dependencies = [
  "tempfile",
 ]
 
+[[package]]
+name = "nix"
+version = "0.30.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74523f3a35e05aba87a1d978330aef40f67b0304ac79c1c00b294c9830543db6"
+dependencies = [
+ "bitflags 2.10.0",
+ "cfg-if",
+ "cfg_aliases",
+ "libc",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.50.3"
@@ -4824,6 +4836,7 @@ version = "0.1.0"
 dependencies = [
  "axum",
  "clap",
+ "nix",
  "serde",
  "serde_json",
  "tokio",