fix(cache): use user-writable ~/.serve.zone/dcrouter for TsmDB and centralize data path logic

readme.md

@@ -219,7 +219,7 @@ const router = new DcRouter({
   storage: { fsPath: '/var/lib/dcrouter/data' },
 
   // Cache database
-  cacheConfig: { enabled: true, storagePath: '/etc/dcrouter/tsmdb' },
+  cacheConfig: { enabled: true, storagePath: '~/.serve.zone/dcrouter/tsmdb' },
 
   // TLS & ACME
   tls: { contactEmail: 'admin@example.com' },
@@ -388,7 +388,7 @@ interface IDcRouterOptions {
   };
   cacheConfig?: {
     enabled?: boolean;                   // default: true
-    storagePath?: string;                // default: '/etc/dcrouter/tsmdb'
+    storagePath?: string;                // default: '~/.serve.zone/dcrouter/tsmdb'
     dbName?: string;                     // default: 'dcrouter'
     cleanupIntervalHours?: number;       // default: 1
     ttlConfig?: {
@@ -734,7 +734,7 @@ An embedded MongoDB-compatible database (via smartdata + LocalTsmDb) for persist
 ```typescript
 cacheConfig: {
   enabled: true,
-  storagePath: '/etc/dcrouter/tsmdb',
+  storagePath: '~/.serve.zone/dcrouter/tsmdb',
   dbName: 'dcrouter',
   cleanupIntervalHours: 1,
   ttlConfig: {