Update dummy examples of cluster files

.vault_pass.example

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+PASS_TO_UNLOCK_host_vars_encrypted

cluster.dummy.yml

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+global_vars:
+  # --- Core Ansible & Directory Settings ---
+  ansible_user: "alex_p"
+  deploy_group: "ytdl"
+  airflow_master_dir: "/srv/airflow_master"
+  airflow_worker_dir: "/srv/airflow_dl_worker"
+
+  # --- Docker & Network Settings ---
+  docker_network_name: "airflow_proxynet"
+
+  # --- Shadowsocks Proxy Configuration ---
+  shadowsocks_image: "ghcr.io/shadowsocks/sslocal-rust:v1.22.0"
+  shadowsocks_cipher_method: "aes-256-gcm"
+  shadowsocks_local_address: "0.0.0.0"
+  shadowsocks_timeout: 20
+  shadowsocks_fast_open: true
+  shadowsocks_mode: "tcp_and_udp"
+
+# List of all available proxies to be deployed on all nodes.
+# The key (e.g., 'sslocal-rust-1087') becomes the service name.
+shadowsocks_proxies:
+  sslocal-rust-1084:
+    server: px012
+    server_port: 8388
+    local_port: 1092
+    vault_password_key: vault_ss_password_1
+
+
+master:
+  af-green:
+    ip: x.x.x.x
+    port: 22