fix:补充示例文件里面缺失的秘钥

manifest/config/config.example.yaml

@@ -44,6 +44,10 @@ jwt:
   adminMaxSessions:  5
   tenantMaxSessions: 10
 
+# Crypto (AES-256 encryption key, 32 bytes hex-encoded = 64 hex chars)
+crypto:
+  encryptionKey: "a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2"
+
 # Email SMTP (fallback defaults, override via opt_options or env vars)
 email:
   smtp: