feat(server): Option to configure SMTPS transport (#22833)

* feat(server): Option to configure SMTPS transport

This commit adds a boolean option in the SMTP transport configuration to
enable the so-called "secure" mode. What it does is use SMTP over TLS
instead of relying on the more common STARTTLS option over plain SMTP.

* Add missing field in dto

* Add missing field

* Use a switch instead of text field

* Add field in spec

* chore: regen open-api

---------

Co-authored-by: Jason Rasmussen <jason@rasm.me>

server/src/config.ts

@@ -159,6 +159,7 @@ export interface SystemConfig {
         ignoreCert: boolean;
         host: string;
         port: number;
+        secure: boolean;
         username: string;
         password: string;
       };
@@ -356,6 +357,7 @@ export const defaults = Object.freeze<SystemConfig>({
         ignoreCert: false,
         host: '',
         port: 587,
+        secure: false,
         username: '',
         password: '',
       },