fix: enforce mandatory ID for --delete flag

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/main.rs

@@ -33,6 +33,11 @@ fn main() -> Result<(), Error> {
     let mut cmd = Args::command();
     let args = Args::parse();
     
+    // Validate arguments based on mode
+    if let Err(e) = args.validate() {
+        cmd.error(ErrorKind::ValueValidation, e).exit();
+    }
+
     stderrlog::new()
         .module(module_path!())
         .quiet(args.options.quiet)