Optimize JuiceFS performance settings and mount options

The changes tune TCP buffers and enhance JuiceFS mount options for
better throughput and caching behavior.

config/ansible/tasks/servers/juicefs.yml

@@ -31,10 +31,24 @@
     mode: "0755"
   become: true
 
+- name: Configure JuiceFS network performance optimizations
+  ansible.builtin.sysctl:
+    name: "{{ item.name }}"
+    value: "{{ item.value }}"
+    state: present
+    reload: true
+  become: true
+  loop:
+    - { name: "net.core.rmem_max", value: "16777216" }
+    - { name: "net.core.wmem_max", value: "16777216" }
+    - { name: "net.ipv4.tcp_rmem", value: "4096 87380 16777216" }
+    - { name: "net.ipv4.tcp_wmem", value: "4096 65536 16777216" }
+
 - name: Set JuiceFS facts
   ansible.builtin.set_fact:
     hetzner_access_key: "{{ lookup('community.general.onepassword', 'mfk2qgnaplgtk6xmfc3r6w6neq', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='AWS_ACCESS_KEY_ID') }}"
-    hetzner_secret_key: "{{ lookup('community.general.onepassword', 'mfk2qgnaplgtk6xmfc3r6w6neq', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='AWS_SECRET_ACCESS_KEY')
+    hetzner_secret_key:
+      "{{ lookup('community.general.onepassword', 'mfk2qgnaplgtk6xmfc3r6w6neq', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='AWS_SECRET_ACCESS_KEY')
       }}"
     redis_password: "{{ lookup('community.general.onepassword', '4cioblm633bdkl6put35lk6ql4', vault='j7nmhqlsjmp2r6umly5t75hzb4', field='password') }}"