feat: store rdp, vnc and telnet logins in a generic per-protocol table

src/backend/tests/plugins/security/credential-shapes.test.ts

@@ -31,9 +31,6 @@ function secretHost(id: number): Record<string, unknown> {
     keyPassword: "s3cret-value",
     sudoPassword: "s3cret-value",
     socks5Password: "s3cret-value",
-    rdpPassword: "s3cret-value",
-    vncPassword: "s3cret-value",
-    telnetPassword: "s3cret-value",
     autostartPassword: "s3cret-value",
     autostartKey: "s3cret-value",
     autostartKeyPassword: "s3cret-value",