### 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
http_servers = []
    def _create_http_endpoint(
        raw_message_delivery: bool = False,
    ) -> Tuple[str, str, str, HTTPServer]:
        server = HTTPServer()
        server.start()
        http_servers.append(server)
        server.expect_request("/sns-endpoint").respond_with_data(status=200)
        endpoint_url = server.url_for("/sns-endpoint")
        wait_for_port_open(endpoint_url)
        topic_arn = sns_create_topic()["TopicArn"]
        subscription = sns_subscription(TopicArn=topic_arn, Protocol="http", Endpoint=endpoint_url)
        subscription_arn = subscription["SubscriptionArn"]
        delivery_policy = {
            "healthyRetryPolicy": {