Add webhook configuration and support to Elsa Server

Integrated webhook sinks via appsettings.json for handling "Run Task" events. Enabled webhook functionality in the application pipeline and added the necessary project reference for Elsa.Webhooks. This enhances event-driven capabilities and improves extensibility.

src/apps/Elsa.Server.Web/Elsa.Server.Web.csproj

@@ -28,6 +28,7 @@
         <ProjectReference Include="..\..\modules\Elsa.Sql.SqlServer\Elsa.Sql.SqlServer.csproj" />
         <ProjectReference Include="..\..\modules\Elsa.Sql\Elsa.Sql.csproj" />
         <ProjectReference Include="..\..\modules\Elsa.Tenants.AspNetCore\Elsa.Tenants.AspNetCore.csproj" />
+        <ProjectReference Include="..\..\modules\Elsa.Webhooks\Elsa.Webhooks.csproj" />
         <ProjectReference Include="..\..\modules\Elsa\Elsa.csproj" />
         <ProjectReference Include="..\..\common\Elsa.DropIns\Elsa.DropIns.csproj" />
         <ProjectReference Include="..\..\modules\Elsa.Alterations.MassTransit\Elsa.Alterations.MassTransit.csproj" />

src/apps/Elsa.Server.Web/Program.cs

@@ -665,7 +665,8 @@ services
                 tenantHttpRouting.WithTenantHeader("X-Tenant-ID");
             });
         }
-
+        
+        elsa.UseWebhooks(webhooks => webhooks.ConfigureSinks += options => builder.Configuration.GetSection("Webhooks").Bind(options));
         elsa.InstallDropIns(options => options.DropInRootDirectory = Path.Combine(Directory.GetCurrentDirectory(), "App_Data", "DropIns"));
         elsa.AddSwagger();
         elsa.AddFastEndpointsAssembly<Program>();

src/apps/Elsa.Server.Web/appsettings.json

@@ -327,5 +327,19 @@
         }
       }
     ]
+  },
+  "Webhooks": {
+    "Sinks": [
+      {
+        "Id": "1",
+        "Name": "Run Task",
+        "Filters": [
+          {
+            "EventType": "Elsa.RunTask"
+          }
+        ],
+        "Url": "https://localhost:6001/webhooks/run-task"
+      }
+    ]
   }
 }