fix: use extend instead of loop + insert

Author: maltesander

rust/operator-binary/src/controller/build/properties/hive_site.rs

@@ -113,9 +113,7 @@ pub fn build(
     }
 
     // 4. User overrides (highest precedence).
-    for (k, v) in overrides {
-        data.insert(k, v);
-    }
+    data.extend(overrides);
 
     Ok(data)
 }

rust/operator-binary/src/controller/build/properties/security_properties.rs

@@ -31,9 +31,7 @@ pub fn build(overrides: BTreeMap<String, String>) -> BTreeMap<String, String> {
     // 2. No automatic operator-injected values.
     // 3. No merged_config contribution.
     // 4. User overrides (highest precedence).
-    for (k, v) in overrides {
-        props.insert(k, v);
-    }
+    props.extend(overrides);
 
     props
 }