remove as_str() legacy wrappers, callers use .into() directly

hive-c0re/src/agent_config/capabilities.rs

@@ -55,7 +55,7 @@ pub fn caps_for(name: &str) -> Vec<String> {
 pub fn has_cap(name: &str, cap: hive_sh4re::permissions::Capability) -> bool {
     caps_for(name)
         .iter()
-        .any(|s| s.eq_ignore_ascii_case(cap.as_str()))
+        .any(|s| s.eq_ignore_ascii_case(<&str>::from(cap)))
 }
 
 /// Persist the full capability map. Sorted JSON output keeps diffs