fix(test): use correct KDS maxBytesPerBatch (10 MiB) in all test files

All test files were using 5 MiB for maxBytesPerBatch, but the KDS
default was 10 MiB (matching maxRecordSizeBytes). This mismatch
caused getRecordsByStream to filter out records at the max size limit.

Author: ekjotmultani

packages/kinesis/amplify_kinesis_dart/test/in_memory_record_storage_test.dart

@@ -15,7 +15,7 @@ void main() {
       storage = InMemoryRecordStorage(
         maxCacheBytes: 10 * 1024 * 1024,
         maxRecordsPerBatch: 500,
-        maxBytesPerBatch: 5 * 1024 * 1024,
+        maxBytesPerBatch: 10 * 1024 * 1024,
         maxRecordSizeBytes: 10 * 1024 * 1024,
       );
     });

packages/kinesis/amplify_kinesis_dart/test/record_client_concurrent_flush_test.dart

@@ -26,7 +26,7 @@ void main() {
           database: db,
           maxCacheBytes: 1024 * 1024,
           maxRecordsPerBatch: 500,
-          maxBytesPerBatch: 5 * 1024 * 1024,
+          maxBytesPerBatch: 10 * 1024 * 1024,
           maxRecordSizeBytes: 10 * 1024 * 1024,
         );
         final sender = _GatedSender();

packages/kinesis/amplify_kinesis_dart/test/record_client_test.dart

@@ -31,7 +31,7 @@ void main() {
         database: db,
         maxCacheBytes: 1024,
         maxRecordsPerBatch: 500,
-        maxBytesPerBatch: 5 * 1024 * 1024,
+        maxBytesPerBatch: 10 * 1024 * 1024,
         maxRecordSizeBytes: 10 * 1024 * 1024,
       );
       mockSender = MockKinesisSender();

packages/kinesis/amplify_kinesis_dart/test/record_validation_test.dart

@@ -52,7 +52,7 @@ void main() {
         database: db,
         maxCacheBytes: 10000,
         maxRecordsPerBatch: 500,
-        maxBytesPerBatch: 5 * 1024 * 1024,
+        maxBytesPerBatch: 10 * 1024 * 1024,
         maxRecordSizeBytes: 10 * 1024 * 1024,
       );
       client = createClient(storage: storage);
@@ -168,7 +168,7 @@ void main() {
             database: tightDb,
             maxCacheBytes: 80,
             maxRecordsPerBatch: 500,
-            maxBytesPerBatch: 5 * 1024 * 1024,
+            maxBytesPerBatch: 10 * 1024 * 1024,
             maxRecordSizeBytes: 10 * 1024 * 1024,
           );
           final tightClient = createClient(storage: tightStorage);

packages/kinesis/amplify_kinesis_dart/test/sqlite_record_storage_cache_accuracy_test.dart

@@ -26,7 +26,7 @@ void main() {
         database: db,
         maxCacheBytes: 1024 * 1024,
         maxRecordsPerBatch: 500,
-        maxBytesPerBatch: 5 * 1024 * 1024,
+        maxBytesPerBatch: 10 * 1024 * 1024,
         maxRecordSizeBytes: 10 * 1024 * 1024,
       );
     });