fix: change SMTP_AUTH from login to always

SMTP_AUTH must be 'always', 'never', or 'if_available', not 'login'.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

asciinema/compose.yaml

@@ -19,7 +19,7 @@ services:
       SMTP_USERNAME: ${EMAIL_SMTP_USER}
       SMTP_PASSWORD: ${EMAIL_SMTP_PASSWORD}
       SMTP_SSL: true
-      SMTP_AUTH: login
+      SMTP_AUTH: always
       SMTP_RETRIES: 1
       SMTP_NO_MX_LOOKUPS: true
       SMTP_ALLOWED_TLS_VERSIONS: tlsv1.2,tlsv1.3