### 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
lambda_url_configs = [config for config in url_configs if config.get("CustomId") == api_id]
    return lambda_url_configs[0]
def event_for_lambda_url(api_id, path, data, headers, method) -> dict:
    raw_path = path.split("?")[0]
    raw_query_string = path.split("?")[1] if len(path.split("?")) > 1 else ""
    query_string_parameters = (
        {} if not raw_query_string else dict(urllib.parse.parse_qsl(raw_query_string))
    )
    now = datetime.utcnow()
    readable = timestamp(time=now, format=TIMESTAMP_READABLE_FORMAT)
    if not any(char in readable for char in ["+", "-"]):
        readable += "+0000"
    source_ip = headers.get("Remote-Addr", "")
    request_context = {
        "accountId": "anonymous",
        "apiId": api_id,
        "domainName": headers.get("Host", ""),
        "domainPrefix": api_id,
        "http": {
            "method": method,
            "path": raw_path,
            "protocol": "HTTP/1.1",
            "sourceIp": source_ip,
            "userAgent": headers.get("User-Agent", ""),
        },
        "requestId": long_uid(),
        "routeKey": "$default",
        "stage": "$default",
        "time": readable,
        "timeEpoch": mktime(ts=now, millis=True),