fix: replace vulnerable users crate with whoami

The users crate (RUSTSEC-2025-0040) has an unfixable vulnerability.
Replace it with the maintained whoami crate for getting the current
username. Also remove metrics.yml workflow as it provided no value.

Cargo.lock

@@ -1571,6 +1571,18 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "libredox"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1744e39d1d6a9948f4f388969627434e31128196de472883b39f148769bfe30a"
+dependencies = [
+ "bitflags 2.11.0",
+ "libc",
+ "plain",
+ "redox_syscall",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.3.8"
@@ -1861,6 +1873,12 @@ version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
 
+[[package]]
+name = "plain"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
+
 [[package]]
 name = "png"
 version = "0.18.1"
@@ -2041,6 +2059,15 @@ dependencies = [
  "getrandom 0.2.17",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ce70a74e890531977d37e532c34d45e9055d2409ed08ddba14529471ed0be16"
+dependencies = [
+ "bitflags 2.11.0",
+]
+
 [[package]]
 name = "regex"
 version = "1.12.3"
@@ -2213,10 +2240,10 @@ dependencies = [
  "tokio",
  "toml 1.0.6+spec-1.1.0",
  "upower_dbus",
- "users",
  "wayland-client",
  "wayland-protocols",
  "wayland-protocols-wlr",
+ "whoami",
  "xkbcommon",
  "zbus",
  "zeroize",
@@ -2874,16 +2901,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "users"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24cc0f6d6f267b73e5a2cadf007ba8f9bc39c6a6f9666f8cf25ea809a153b032"
-dependencies = [
- "libc",
- "log",
-]
-
 [[package]]
 name = "utf8_iter"
 version = "1.0.4"
@@ -2947,6 +2964,12 @@ dependencies = [
  "wit-bindgen",
 ]
 
+[[package]]
+name = "wasite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8dad83b4f25e74f184f64c43b150b91efe7647395b42289f38e50566d82855b"
+
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.114"
@@ -3148,6 +3171,17 @@ version = "0.25.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f20c57d8d7db6d3b86154206ae5d8fba62dd39573114de97c2cb0578251f8e1"
 
+[[package]]
+name = "whoami"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d4a4db5077702ca3015d3d02d74974948aba2ad9e12ab7df718ee64ccd7e97d"
+dependencies = [
+ "libredox",
+ "wasite",
+ "web-sys",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"