fix: change sqs body max size to 1 MiB

https://aws.amazon.com/about-aws/whats-new/2025/08/amazon-sqs-max-payload-size-1mib/

Author: CallumNZ

.github/workflows/build.yml

@@ -20,7 +20,7 @@ jobs:
     uses: GeoNet/Actions/.github/workflows/reusable-go-apps.yml@main
     with:
       testSetup: |
-        docker run --name localstack -d --rm -p 4566:4566 -p 4510-4559:4510-4559 docker.io/localstack/localstack:4.0.3
+        docker run --name localstack -d --rm -p 4566:4566 -p 4510-4559:4510-4559 docker.io/localstack/localstack:4.10.0
         echo "waiting for localstack to be ready"
         until curl -v localhost:4566; do
           sleep 1s

aws/sqs/sqs.go

@@ -353,7 +353,7 @@ func (s *SQS) SendNBatch(ctx context.Context, queueURL string, bodies []string)
 
 	const (
 		maxCount = 10
-		maxSize  = 262144 // 256 KiB
+		maxSize  = 1048576 // 1 MiB
 	)
 
 	allErrors := make([]error, 0)

aws/sqs/sqs_integration_test.go

@@ -455,7 +455,7 @@ func TestSendBatch(t *testing.T) {
 	require.Nil(t, err, fmt.Sprintf("error creating sqs client: %v", err))
 
 	// ACTION
-	var maxBytes int = 262144
+	var maxBytes int = 1048576
 	maxSizeSingleMessage := ""
 	for range maxBytes {
 		maxSizeSingleMessage += "a"
@@ -474,7 +474,7 @@ func TestSendBatch(t *testing.T) {
 	assert.NotNil(t, err)
 
 	// ACTION
-	var maxHalfBytes int = 131072
+	var maxHalfBytes int = 524288
 	maxHalfSizeMessage := ""
 	for range maxHalfBytes {
 		maxHalfSizeMessage += "a"
@@ -531,7 +531,7 @@ func TestSendNBatch(t *testing.T) {
 	require.Nil(t, err, fmt.Sprintf("error creating sqs client: %v", err))
 
 	// ACTION
-	var maxBytes int = 262144
+	var maxBytes int = 1048576
 	maxSizeSingleMessage := ""
 	for range maxBytes {
 		maxSizeSingleMessage += "a"