Reset Dagu and n8n passwords

## Steps - [ ] Generate new Dagu password - [ ] Edit ~/.config/systemd/user/dagu.service — update DAGU_ADMIN_PASSWORD env var - [ ] Run: systemctl --user daemon-reload && systemctl --user restart dagu - [ ] Generate new n8n password - [ ] Reset via n8n web UI (Settings → Personal → Password) or reset DB - [ ] Test login on both - [ ] Store new passwords in pass (once set up)