### 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
return "sqs"
    def start(self):
        if self.SQS_LISTENER_THREAD:
            return
        LOG.debug("Starting SQS message polling thread for Lambda API")
        self.SQS_LISTENER_THREAD["_thread_"] = thread = FuncThread(self._listener_loop)
        thread.start()
    def get_matching_event_sources(self) -> List[Dict]:
        return get_event_sources(source_arn=r".*:sqs:.*")
    def _listener_loop(self, *args):
        while True:
            try:
                sources = self.get_matching_event_sources()
                if not sources: