Fix empty array handling to be consistent with empty objects

Co-authored-by: neSpecc <3684889+neSpecc@users.noreply.github.com>

Author: Copilot

workers/sentry/src/utils/converter.ts

@@ -20,6 +20,10 @@ function flattenObject(obj: unknown, prefix = ''): string[] {
   }
 
   if (Array.isArray(obj)) {
+    if (obj.length === 0) {
+      return [ prefix ? `${prefix}=[]` : '[]' ];
+    }
+
     obj.forEach((value, index) => {
       const key = prefix ? `${prefix}.${index}` : String(index);
 

workers/sentry/tests/converter.test.ts

@@ -244,6 +244,7 @@ describe('converter utils', () => {
 
       expect(backtrace?.[0].arguments).toEqual([
         'emptyObject={}',
+        'emptyArray=[]',
         'normalValue=test',
       ]);
     });