fix: remove useless comparison to fix clippy absurd_extreme_comparisons warning

Replace >= 0 comparison on u64 value with existence check since u64 values
are always non-negative. This fixes the clippy warning that was causing CI to fail.

Author: avrabe

studio-mcp-server/tests/mock_plm_server.rs

@@ -1874,12 +1874,8 @@ mod tests {
         assert_eq!(resources["status"], "success");
         assert!(resources["data"]["cpu"]["total_cores"].as_u64().unwrap() > 0);
         assert!(resources["data"]["memory"]["total_gb"].as_u64().unwrap() > 0);
-        assert!(
-            resources["data"]["builds"]["active_builds"]
-                .as_u64()
-                .unwrap()
-                >= 0
-        );
+        // active_builds is u64, so it's always >= 0 - just verify it exists
+        assert!(resources["data"]["builds"]["active_builds"].as_u64().is_some());
     }
 
     #[tokio::test]