### 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
response_data = json.loads(response.data)
    response_data.update({"Message": response_data.get("message")})
    response.set_data(json.dumps(response_data))
    return response
@app.route("%s/functions/<function>/url" % API_PATH_ROOT_2, methods=["POST"])
def create_url_config(function):
    arn = func_arn(function)
    qualifier = request.args.get("Qualifier")
    q_arn = func_qualifier(function, qualifier)
    lambda_backend = LambdaRegion.get()
    function = lambda_backend.lambdas.get(arn)
    if function is None:
        response = error_response("Function does not exist", 404, "ResourceNotFoundException")
        return correct_error_response_for_url_config(response)
    if qualifier and not function.qualifier_exists(qualifier=qualifier):
        return not_found_error()
    arn = q_arn or arn
    lambda_backend = LambdaRegion.get()
    if arn in lambda_backend.url_configs:
        return error_response(
            f"Failed to create function url config for [functionArn = {arn}]. Error message:  FunctionUrlConfig exists for this Lambda function",
            409,
            "ResourceConflictException",
        )
    custom_id = md5(str(random()))
    region = LambdaRegion.get_current_request_region()
    url = f"http://{custom_id}.lambda-url.{region}.{LOCALHOST_HOSTNAME}:{config.EDGE_PORT_HTTP or config.EDGE_PORT}/"