feat: Enhance Task Runner with simulation and failure policy support

- Added tests for output projection and failure policy population in TaskPackPlanner.
- Introduced new failure policy manifest in TestManifests.
- Implemented simulation endpoints in the web service for task execution.
- Created TaskRunnerServiceOptions for configuration management.
- Updated appsettings.json to include TaskRunner configuration.
- Enhanced PackRunWorkerService to handle execution graphs and state management.
- Added support for parallel execution and conditional steps in the worker service.
- Updated documentation to reflect new features and changes in execution flow.

src/Cli/StellaOps.Cli/Telemetry/CliMetrics.cs

@@ -13,6 +13,7 @@ internal static class CliMetrics
     private static readonly Counter<long> OfflineKitDownloadCounter = Meter.CreateCounter<long>("stellaops.cli.offline.kit.download.count");
     private static readonly Counter<long> OfflineKitImportCounter = Meter.CreateCounter<long>("stellaops.cli.offline.kit.import.count");
     private static readonly Counter<long> PolicySimulationCounter = Meter.CreateCounter<long>("stellaops.cli.policy.simulate.count");
+    private static readonly Counter<long> TaskRunnerSimulationCounter = Meter.CreateCounter<long>("stellaops.cli.taskrunner.simulate.count");
     private static readonly Counter<long> PolicyActivationCounter = Meter.CreateCounter<long>("stellaops.cli.policy.activate.count");
     private static readonly Counter<long> SourcesDryRunCounter = Meter.CreateCounter<long>("stellaops.cli.sources.dryrun.count");
     private static readonly Counter<long> AocVerifyCounter = Meter.CreateCounter<long>("stellaops.cli.aoc.verify.count");
@@ -57,6 +58,12 @@ internal static class CliMetrics
             new("outcome", string.IsNullOrWhiteSpace(outcome) ? "unknown" : outcome)
         });
 
+    public static void RecordTaskRunnerSimulation(string outcome)
+        => TaskRunnerSimulationCounter.Add(1, new KeyValuePair<string, object?>[]
+        {
+            new("outcome", string.IsNullOrWhiteSpace(outcome) ? "unknown" : outcome)
+        });
+
     public static void RecordPolicyActivation(string outcome)
         => PolicyActivationCounter.Add(1, new KeyValuePair<string, object?>[]
         {