fix(jobengine): register startup migrations for orchestrator schema

Wire AddStartupMigrations so JobEngine converges the orchestrator schema
on fresh database or wiped volumes without manual bootstrap scripts.
Adds StellaOps.Infrastructure.Postgres.Migrations dependency.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/JobEngine/StellaOps.JobEngine/StellaOps.JobEngine.Infrastructure/ServiceCollectionExtensions.cs

@@ -2,6 +2,7 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Npgsql;
+using StellaOps.Infrastructure.Postgres.Migrations;
 using StellaOps.JobEngine.Core.Backfill;
 using StellaOps.JobEngine.Core.DeadLetter;
 using StellaOps.JobEngine.Core.Observability;
@@ -54,6 +55,12 @@ public static class ServiceCollectionExtensions
                 }
             });
 
+        services.AddStartupMigrations<JobEngineServiceOptions>(
+            schemaName: "orchestrator",
+            moduleName: "JobEngine",
+            migrationsAssembly: typeof(JobEngineDataSource).Assembly,
+            connectionStringSelector: options => options.Database.ConnectionString);
+
         // Register data source
         services.AddSingleton<JobEngineDataSource>();
 

src/JobEngine/StellaOps.JobEngine/StellaOps.JobEngine.Infrastructure/StellaOps.JobEngine.Infrastructure.csproj

@@ -20,6 +20,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\StellaOps.JobEngine.Core\StellaOps.JobEngine.Core.csproj"/>
+    <ProjectReference Include="..\..\..\__Libraries\StellaOps.Infrastructure.Postgres\StellaOps.Infrastructure.Postgres.csproj" />
     <ProjectReference Include="..\..\..\Telemetry\StellaOps.Telemetry.Core\StellaOps.Telemetry.Core\StellaOps.Telemetry.Core.csproj"/>
     <ProjectReference Include="..\..\..\Router/__Libraries/StellaOps.Messaging\StellaOps.Messaging.csproj" />
   </ItemGroup>

src/JobEngine/StellaOps.JobEngine/StellaOps.JobEngine.Tests/Infrastructure/JobEngineInfrastructureRegistrationTests.cs

@@ -0,0 +1,33 @@
+using FluentAssertions;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using StellaOps.JobEngine.Infrastructure;
+using StellaOps.TestKit;
+
+namespace StellaOps.JobEngine.Tests.Infrastructure;
+
+public sealed class JobEngineInfrastructureRegistrationTests
+{
+    [Trait("Category", TestCategories.Unit)]
+    [Fact]
+    public void AddJobEngineInfrastructure_RegistersStartupMigrationHost()
+    {
+        var configuration = new ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["JobEngine:Database:ConnectionString"] = "Host=postgres;Database=stellaops;Username=postgres;Password=postgres"
+            })
+            .Build();
+
+        var services = new ServiceCollection();
+        services.AddLogging();
+
+        services.AddJobEngineInfrastructure(configuration);
+
+        services
+            .Where(descriptor => descriptor.ServiceType == typeof(IHostedService))
+            .Should()
+            .ContainSingle("clean-reset installs need JobEngine startup migrations to create the orchestrator schema before serving traffic");
+    }
+}