### 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
def update_function_code(function):
    """Update the code of an existing function
    ---
    operationId: 'updateFunctionCode'
    parameters:
        - name: 'request'
          in: body
    """
    region = LambdaRegion.get()
    arn = func_arn(function)
    lambda_function = region.lambdas.get(arn)
    if not lambda_function:
        return not_found_error("Function not found: %s" % arn)
    data = json.loads(to_str(request.data))
    lambda_function.code = data
    result = set_function_code(lambda_function)
    if isinstance(result, Response):
        return result
    if data.get("Architectures"):
        lambda_function.architectures = data["Architectures"]
    lambda_function.last_modified = datetime.utcnow()
    result.update(format_func_details(lambda_function))
    if data.get("Publish"):
        result["Version"] = publish_new_function_version(arn)["Version"]
    return jsonify(result or {})
@app.route("%s/functions/<function>/configuration" % API_PATH_ROOT, methods=["GET"])
def get_function_configuration(function):
    """Get the configuration of an existing function
    ---
    operationId: 'getFunctionConfiguration'