Add a Tasker 0.3.0 instance to Helian, with persistent data under /opt/tasker/data and port 8085 bound to Helian's Tailscale IP.
Declare HELIAN_TAILNET_IP once in the tracked, non-secret helian/.env file. Update the installer to create the data directory and link the environment and included Compose files under /opt.
Validation: Compose configuration resolves the shared IP in the included Tasker service; Tasker Compose validation, Lua syntax checks, and git diff --check pass. Not deployed.