### 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
parsed_path = urlparse.urlparse(path)
    path = parsed_path.path
    parsed_query_string_params = urlparse.parse_qs(parsed_path.query)
    query_string_params = {}
    for query_param_name, query_param_values in parsed_query_string_params.items():
        if len(query_param_values) == 1:
            query_string_params[query_param_name] = query_param_values[0]
        else:
            query_string_params[query_param_name] = query_param_values
    
    path = path.rstrip("/") or "/"
    return [path, query_string_params]
def get_cors_response(headers):
    
    
    
    response = Response()
    response.status_code = 200
    response.headers["Access-Control-Allow-Origin"] = "*"
    response.headers["Access-Control-Allow-Methods"] = "GET, POST, PUT, DELETE, PATCH"
    response.headers["Access-Control-Allow-Headers"] = "*"
    response._content = ""
    return response
def get_rest_api_paths(rest_api_id, region_name=None):