fix(pidusage): prune history entries for PIDs not present in the requested set to avoid stale data and memory growth

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartmetrics',
-  version: '3.0.1',
+  version: '3.0.2',
   description: 'A package for easy collection and reporting of system and process metrics.'
 }

ts/smartmetrics.pidusage.ts

@@ -125,5 +125,12 @@ export async function getPidUsage(
     });
   }
 
+  // Prune history entries for PIDs no longer in the requested set
+  for (const histPid of history.keys()) {
+    if (!pids.includes(histPid)) {
+      history.delete(histPid);
+    }
+  }
+
   return result;
 }