fix(runtime): prevent memory leaks and improve shutdown/stream handling across services

ts/radius/classes.vlan.manager.ts

@@ -100,6 +100,14 @@ export class VlanManager {
     // Cache the result
     this.normalizedMacCache.set(mac, normalized);
 
+    // Prevent unbounded cache growth
+    if (this.normalizedMacCache.size > 10000) {
+      const iterator = this.normalizedMacCache.keys();
+      for (let i = 0; i < 1000; i++) {
+        this.normalizedMacCache.delete(iterator.next().value);
+      }
+    }
+
     return normalized;
   }