refactor: modularize email processing logic and improve service structure

- Extract email template handling, rendering, and sending code into `Worker.Services` project.
- Introduce `EmailTemplateService`, `EmailTemplateRenderingService`, and `SendEmailService`.
- Simplify consumer logic by delegating to scoped services.
- Update project dependencies and package references accordingly.

HrynCo.NotificationService.Worker/appsettings.Development.json

@@ -1,4 +1,14 @@
 {
+  "App": {
+    "ConnectionString": "Host=192.168.2.121;Port=55435;Database=hrynco_ns_prod;Username=ns_user;Password=HAwS0c4A1QmH",
+    "RabbitMq": {
+      "Host": "192.168.2.121",
+      "Port": 5675,
+      "User": "ns_user",
+      "Password": "LN22mEWYdfCy",
+      "VirtualHost": "/"
+    }
+  },
   "Serilog": {
     "MinimumLevel": {
       "Default": "Debug",
@@ -7,6 +17,20 @@
         "Microsoft.EntityFrameworkCore": "Information",
         "Microsoft.AspNetCore": "Information"
       }
+    },
+    "WriteTo": [
+      { "Name": "Console" },
+      {
+        "Name": "Seq",
+        "Args": {
+          "serverUrl": "http://192.168.2.121:5341"
+        }
+      }
+    ],
+    "Enrich": [ "FromLogContext" ],
+    "Properties": {
+      "Application": "hrynco-notification-service-worker",
+      "Environment": "Development"
     }
   }
 }