build: remove unused rand dependency

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: aster-void

Cargo.lock

@@ -14,7 +14,6 @@ clap = { version = "4", features = ["derive"] }
 dirs = "6"
 serde = { version = "1", features = ["derive"] }
 serde_yaml = "0.9"
-rand = "0.8"
 xtra = { version = "0.6", features = ["tokio"] }
 dotenvy = "0.15"
 shellexpand = "3"