Encryption

Encrypts the given payload using asymmetric encryption with a provided certificate.

Args: request (EncryptionRequest): The request body containing the data to encrypt. x_api_key (str): The API key used to fetch product details for encryption. x_cert_serial_num (str): The serial number of the certificate to be used for encryption. cert_pem_str (str): The PEM-formatted certificate string for encryption.

Returns: EncryptionResponse: The response model containing the encrypted data.

Raises: HTTPException: 400 for invalid input, 401 for unauthorized access, 500 for server errors.