validateRecaptcha
Validates the reCAPTCHA response token from form parameters within a Ktor RoutingContext.
If reCAPTCHA is configured and the token is missing or invalid, this function responds with an HTTP 400 Bad Request and returns false. Returns true when validation succeeds or reCAPTCHA is not configured.
Return
true if validation passed or reCAPTCHA is disabled, false otherwise.
Parameters
config
the RecaptchaConfig providing keys and enabled status.
params
the form Parameters containing the g-recaptcha-response token.