refactor: 切换数据库连接到远程服务器

- PostgreSQL: 192.168.1.154:5432 (auto_agent)
- Redis: 192.168.1.154:31040
- RabbitMQ: 192.168.1.154:31020
- RabbitMQ 注册代码支持 Port 配置

src/RAG.Api/appsettings.json

@@ -7,13 +7,14 @@
   },
   "AllowedHosts": "*",
   "ConnectionStrings": {
-    "Default": "Host=localhost;Port=5432;Database=rag;Username=rag;Password=rag123",
-    "Redis": "localhost:6379"
+    "Default": "Host=192.168.1.154;Port=5432;Database=rag;Username=auto_agent;Password=auto_agent",
+    "Redis": "192.168.1.154:31040,password=xn001624."
   },
   "RabbitMq": {
-    "Host": "localhost",
-    "Username": "rag",
-    "Password": "rag123"
+    "Host": "192.168.1.154",
+    "Port": 31020,
+    "Username": "guest",
+    "Password": "xn001624."
   },
   "Jwt": {
     "SigningKey": "RagJwtSecretKey2026MustBeAtLeast32CharsLong!",

src/RAG.Infrastructure/Messaging/RabbitMqExtensions.cs

@@ -13,8 +13,9 @@ public static class RabbitMqExtensions
             return new ConnectionFactory
             {
                 HostName = config["RabbitMq:Host"] ?? "localhost",
-                UserName = config["RabbitMq:Username"] ?? "rag",
-                Password = config["RabbitMq:Password"] ?? "rag123"
+                Port = int.TryParse(config["RabbitMq:Port"], out var port) ? port : 5672,
+                UserName = config["RabbitMq:Username"] ?? "guest",
+                Password = config["RabbitMq:Password"] ?? "guest"
             };
         });
         return services;