Add hetzner-floating-ip.service systemd unit to base role so that
the floating IP is bound to eth0 on every boot. The task is
conditional (runs only when hetzner_floating_ip is defined in
host_vars). Add 49.12.116.113 as the floating IP for iklim-app-01
in test host_vars.
* Introduces an Ansible role for installing and registering `act_runner` for Gitea Actions.
* Automates PostgreSQL and MongoDB deployment on Docker Swarm in the test environment, leveraging Docker named volumes for data persistence.
* Translates core documentation, including `README.md` and `setup/04-test-db-docker-kurulum.md`, to Turkish.
* Adds comprehensive documentation for firewall architecture (`facts/firewall.md`) and Docker Swarm node recovery (`facts/swarm-node-recovery.md`).
* Enhances security hardening by ensuring `fail2ban` is enabled and streamlining admin SSH key management via Ansible.
* Updates Ansible vault structure to support new secret variables and adds `.vault_pass` to `.gitignore`.
