### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Basically we want to only run the lambda when an insert is occurring in DynamoDB.
I tested using Dynobase deleting a record and the lambda still triggered.

```
resource "aws_lambda_event_source_mapping" "event-log" {
	event_source_arn  = aws_dynamodb_table.event-log.stream_arn
	function_name     = module.main.lambda-arn
	starting_position = "LATEST"
	enabled = true # change to false when truncating the table in localstack
	maximum_retry_attempts = 1 # limit retry on failure to 1 for now

	# https://dev.to/aws-builders/filtering-dynamodb-streams-before-lambda-p5p
	filter_criteria { # Doesn't seem to work on LocalStack for now
		filter {
			pattern = jsonencode({
				body = {
					eventName : ["INSERT"]
				}
			})
		}
	}
}
```


### 🧑‍💻 Implementation

_No response_

### Anything else?

 https://dev.to/aws-builders/filtering-dynamodb-streams-before-lambda-p5p
"minDelayTarget": 1,
                "maxDelayTarget": 1,
                "numRetries": 0,
                "numNoDelayRetries": 0,
                "numMinDelayRetries": 0,
                "numMaxDelayRetries": 0,
                "backoffFunction": "linear",
            },
            "sicklyRetryPolicy": None,
            "throttlePolicy": {"maxReceivesPerSecond": 1000},
            "guaranteed": False,
        }
        sns_client.set_subscription_attributes(
            SubscriptionArn=subscription_arn,
            AttributeName="DeliveryPolicy",
            AttributeValue=json.dumps(delivery_policy),
        )
        if raw_message_delivery:
            sns_client.set_subscription_attributes(
                SubscriptionArn=subscription_arn,
                AttributeName="RawMessageDelivery",
                AttributeValue="true",
            )
        return topic_arn, subscription_arn, endpoint_url, server
    yield _create_http_endpoint
    for http_server in http_servers:
        if http_server.is_running():
            http_server.stop()
@pytest.fixture
def route53_hosted_zone(route53_client):