refactor(compose): adaptasi pola network tailscale ala firefly-iii
- Semua service share netns elemes-ts (network_mode: service:elemes-ts),
hapus bridge network elemes_network
- lms-tail.json: proxy target 127.0.0.1 (bukan nama service DNS)
- flowchart pindah port 80 → 8081 (konflik port di netns bersama),
tambah nginx.conf custom + EXPOSE 8081
- env internal (COMPILER_WORKER_URL, VELXIO_COMPILER_URL, API_BACKEND,
hooks fallback, vite dev proxy) → 127.0.0.1
- fix format volume velxio-data/velxio-arduino-libs agar kompatibel
podman-compose 1.0.6 (named volume standar)