fix(simulation): suppress clippy too_many_arguments on cmd_add_body

The refactor from &Commands to individual parameters exposed the
13-argument signature to clippy. Allow attribute is appropriate
here — the parameters map 1:1 to DB columns.

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

server/src/bin/atlas/mutate.rs

@@ -3,6 +3,7 @@ use std::process;
 use rusqlite::{params, Connection};
 use serde::Serialize;
 
+#[allow(clippy::too_many_arguments)]
 pub fn cmd_add_body(
     conn: &Connection,
     id: &str,