fix(signal-cli): correct PVC mount path to /var/lib/signal-cli

- Mount PVC root at /var/lib/signal-cli (where data/ directory exists)
- Previous path /home/.local/share/signal-cli was incorrect nested structure

cluster/applications/signal-cli/deployment.yaml

@@ -27,7 +27,7 @@ spec:
         command: ["/usr/bin/signal-cli"]
         args:
         - "--config"
-        - "/home/.local/share/signal-cli"
+        - "/var/lib/signal-cli"
         - "--account"
         - "+126****8840"
         - "daemon"
@@ -39,7 +39,7 @@ spec:
           protocol: TCP
         volumeMounts:
         - name: signal-data
-          mountPath: /home/.local/share/signal-cli
+          mountPath: /var/lib/signal-cli
         resources:
           requests:
             memory: "256Mi"