### 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
"Description": code_signing_obj.description,
            "LastModified": code_signing_obj.last_modified,
        }
    }
    return Response(json.dumps(result), status=201)
@app.route("/2020-04-22/code-signing-configs/<arn>", methods=["GET"])
def get_code_signing_config(arn):
    region = LambdaRegion.get()
    try:
        code_signing_obj = region.code_signing_configs[arn]
    except KeyError:
        msg = "The Lambda code signing configuration %s can not be found." % arn
        return not_found_error(msg)
    result = {
        "CodeSigningConfig": {
            "AllowedPublishers": {
                "SigningProfileVersionArns": code_signing_obj.signing_profile_version_arns
            },
            "CodeSigningConfigArn": code_signing_obj.arn,
            "CodeSigningConfigId": code_signing_obj.id,
            "CodeSigningPolicies": {
                "UntrustedArtifactOnDeployment": code_signing_obj.untrusted_artifact_on_deployment
            },
            "Description": code_signing_obj.description,
            "LastModified": code_signing_obj.last_modified,
        }
    }
    return Response(json.dumps(result), status=200)
@app.route("/2020-04-22/code-signing-configs/<arn>", methods=["DELETE"])
def delete_code_signing_config(arn):