feat: Add Go module and workspace test fixtures

- Created expected JSON files for Go modules and workspaces.
- Added go.mod and go.sum files for example projects.
- Implemented private module structure with expected JSON output.
- Introduced vendored dependencies with corresponding expected JSON.
- Developed PostgresGraphJobStore for managing graph jobs.
- Established SQL migration scripts for graph jobs schema.
- Implemented GraphJobRepository for CRUD operations on graph jobs.
- Created IGraphJobRepository interface for repository abstraction.
- Added unit tests for GraphJobRepository to ensure functionality.

src/Cli/__Tests/StellaOps.Cli.Tests/Commands/SystemCommandBuilderTests.cs

@@ -1,4 +1,6 @@
 using System.CommandLine;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
 using StellaOps.Cli.Commands;
 using StellaOps.Cli.Services;
 using Xunit;
@@ -10,7 +12,7 @@ public class SystemCommandBuilderTests
     [Fact]
     public void BuildSystemCommand_AddsMigrationsSubcommands()
     {
-        var system = SystemCommandBuilder.BuildSystemCommand();
+        var system = BuildSystemCommand();
         Assert.NotNull(system);
         Assert.Equal("system", system.Name);
         Assert.Contains(system.Subcommands, c => c.Name == "migrations-run");
@@ -28,4 +30,16 @@ public class SystemCommandBuilderTests
         Assert.Contains("Notify", MigrationModuleRegistry.ModuleNames);
         Assert.Contains("Excititor", MigrationModuleRegistry.ModuleNames);
     }
+
+    private static Command BuildSystemCommand()
+    {
+        var services = new ServiceCollection();
+        services.AddLogging();
+        services.AddSingleton<IConfiguration>(new ConfigurationBuilder().Build());
+        services.AddSingleton<MigrationCommandService>();
+        var provider = services.BuildServiceProvider();
+
+        var verboseOption = new Option<bool>("--verbose");
+        return SystemCommandBuilder.BuildSystemCommand(provider, verboseOption, CancellationToken.None);
+    }
 }