refactor(#2285): repoint all hive-c0re host-path consumers to paths.rs

hive-c0re/src/lifecycle/mod.rs

@@ -864,7 +864,7 @@ pub async fn sync_tmpfiles() {
 /// # Errors
 /// Returns an error if `create_dir_all` fails.
 pub fn ensure_agent_runtime_dir(name: &str) -> Result<()> {
-    let dir = std::path::PathBuf::from(format!("/run/hyperhive/agents/{name}"));
+    let dir = crate::paths::agent_runtime_dir(name);
     std::fs::create_dir_all(&dir)
         .with_context(|| format!("create agent runtime dir {}", dir.display()))
 }