feat: Add new projects to solution and implement contract testing documentation

- Added "StellaOps.Policy.Engine", "StellaOps.Cartographer", and "StellaOps.SbomService" projects to the StellaOps solution.
- Created AGENTS.md to outline the Contract Testing Guild Charter, detailing mission, scope, and definition of done.
- Established TASKS.md for the Contract Testing Task Board, outlining tasks for Sprint 62 and Sprint 63 related to mock servers and replay testing.

src/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.Worker/Program.cs

@@ -0,0 +1,7 @@
+using StellaOps.TimelineIndexer.Worker;
+
+var builder = Host.CreateApplicationBuilder(args);
+builder.Services.AddHostedService<Worker>();
+
+var host = builder.Build();
+host.Run();

src/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.Worker/Properties/launchSettings.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "StellaOps.TimelineIndexer.Worker": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "environmentVariables": {
+        "DOTNET_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

src/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.Worker/StellaOps.TimelineIndexer.Worker.csproj

@@ -0,0 +1,43 @@
+<?xml version="1.0" ?>
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+  
+
+  
+  <PropertyGroup>
+    
+    
+    <UserSecretsId>dotnet-StellaOps.TimelineIndexer.Worker-f6dbdeac-9eb5-4250-9384-ef93fc70f770</UserSecretsId>
+    
+  
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <LangVersion>preview</LangVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  
+
+  
+  <ItemGroup>
+    
+    
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="10.0.0-rc.1.25451.107"/>
+    
+  
+  </ItemGroup>
+  
+
+  
+  <ItemGroup>
+    
+    
+    <ProjectReference Include="..\StellaOps.TimelineIndexer.Core\StellaOps.TimelineIndexer.Core.csproj"/>
+    
+    
+    <ProjectReference Include="..\StellaOps.TimelineIndexer.Infrastructure\StellaOps.TimelineIndexer.Infrastructure.csproj"/>
+    
+  
+  </ItemGroup>
+  
+
+</Project>

src/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.Worker/Worker.cs

@@ -0,0 +1,16 @@
+namespace StellaOps.TimelineIndexer.Worker;
+
+public class Worker(ILogger<Worker> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            if (logger.IsEnabled(LogLevel.Information))
+            {
+                logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
+            }
+            await Task.Delay(1000, stoppingToken);
+        }
+    }
+}

src/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.Worker/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}

src/StellaOps.TimelineIndexer/StellaOps.TimelineIndexer.Worker/appsettings.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  }
+}