Implement MongoDB-based storage for Pack Run approval, artifact, log, and state management

- Added MongoPackRunApprovalStore for managing approval states with MongoDB.
- Introduced MongoPackRunArtifactUploader for uploading and storing artifacts.
- Created MongoPackRunLogStore to handle logging of pack run events.
- Developed MongoPackRunStateStore for persisting and retrieving pack run states.
- Implemented unit tests for MongoDB stores to ensure correct functionality.
- Added MongoTaskRunnerTestContext for setting up MongoDB test environment.
- Enhanced PackRunStateFactory to correctly initialize state with gate reasons.

src/Cli/StellaOps.Cli/Services/IBackendOperationsClient.cs

@@ -4,6 +4,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using StellaOps.Cli.Configuration;
 using StellaOps.Cli.Services.Models;
+using StellaOps.Cli.Services.Models.AdvisoryAi;
 
 namespace StellaOps.Cli.Services;
 
@@ -46,4 +47,8 @@ internal interface IBackendOperationsClient
     Task<PolicyFindingExplainResult> GetPolicyFindingExplainAsync(string policyId, string findingId, string? mode, CancellationToken cancellationToken);
 
     Task<EntryTraceResponseModel?> GetEntryTraceAsync(string scanId, CancellationToken cancellationToken);
+
+    Task<AdvisoryPipelinePlanResponseModel> CreateAdvisoryPipelinePlanAsync(AdvisoryAiTaskType taskType, AdvisoryPipelinePlanRequestModel request, CancellationToken cancellationToken);
+
+    Task<AdvisoryPipelineOutputModel?> TryGetAdvisoryPipelineOutputAsync(string cacheKey, AdvisoryAiTaskType taskType, string profile, CancellationToken cancellationToken);
 }