Add Serilog configuration to appsettings.Development.json

Introduced a new "Serilog" configuration section to enhance
logging control in the development environment. Set the
default logging level to "Debug" and added overrides for
specific namespaces ("Microsoft", "Microsoft.AspNetCore",
"Microsoft.EntityFrameworkCore", and "System") to "Warning".

src/presentation/DigitalData.MessagingService.API/appsettings.Development.json

@@ -4,5 +4,16 @@
       "Default": "Information",
       "Microsoft.AspNetCore": "Warning"
     }
+  },
+  "Serilog": {
+    "MinimumLevel": {
+      "Default": "Debug",
+      "Override": {
+        "Microsoft": "Warning",
+        "Microsoft.AspNetCore": "Warning",
+        "Microsoft.EntityFrameworkCore": "Warning",
+        "System": "Warning"
+      }
+    }
   }
 }