fix(test): resolve hangs in multiple unit tests and harden runner

Co-authored-by: PR0M3TH3AN <[email protected]>

scripts/run-unit-tests.mjs

@@ -178,6 +178,8 @@ async function run() {
   }
 
   console.log("\n✔ All unit tests passed");
+  // Force exit to ensure we don't hang on lingering handles/timers
+  process.exit(0);
 }
 
 try {