fix: use structured tracing field for label in parse_id_set

tracing::warn! does not support runtime format args like {label}.
Move label to a structured field so it renders correctly in logs.

Author: masami-agent

src/main.rs

@@ -89,7 +89,7 @@ fn parse_id_set(raw: &[String], label: &str) -> anyhow::Result<HashSet<u64>> {
         .filter_map(|s| match s.parse() {
             Ok(id) => Some(id),
             Err(_) => {
-                tracing::warn!(value = %s, "ignoring invalid {label} entry");
+                tracing::warn!(value = %s, label = label, "ignoring invalid entry");
                 None
             }
         })