Redmine SSO flow: Cloudron login -> click "Continue with KNEL Cloud"
button (#login-oauth-submit-1) -> authenticated. Required Cloudron
admin to grant vp-techops access to the Redmine app first.
API key was already present but hidden. Click "Show" in the
.api-key-actions section to reveal it from the #api-access-key
pre element. Key verified via X-Redmine-API-Key header.
