fix: handle Symbol values in logger formatLogDetail

Author: ThomasK33

src/util/logger.ts

@@ -53,7 +53,8 @@ function formatLogDetail(detail: unknown): string {
     typeof detail === 'string' ||
     typeof detail === 'number' ||
     typeof detail === 'boolean' ||
-    typeof detail === 'bigint'
+    typeof detail === 'bigint' ||
+    typeof detail === 'symbol'
   ) {
     return String(detail);
   }

test/unit/util/logger.test.ts

@@ -127,7 +127,7 @@ describe('Logger', () => {
       '[agent-terminal] debug: msg 42\n',
       '[agent-terminal] debug: msg true\n',
       '[agent-terminal] debug: msg [object Object]\n',
-      '[agent-terminal] debug: msg undefined\n',
+      '[agent-terminal] debug: msg Symbol(test)\n',
       '[agent-terminal] debug: msg 42\n',
     ]);
   });