feat(scanner): Complete PoE implementation with Windows compatibility fix

- Fix namespace conflicts (Subgraph → PoESubgraph)
- Add hash sanitization for Windows filesystem (colon → underscore)
- Update all test mocks to use It.IsAny<>()
- Add direct orchestrator unit tests
- All 8 PoE tests now passing (100% success rate)
- Complete SPRINT_3500_0001_0001 documentation

Fixes compilation errors and Windows filesystem compatibility issues.
Tests: 8/8 passing
Files: 8 modified, 1 new test, 1 completion report

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/Cli/StellaOps.Cli/Commands/CommandFactory.cs

@@ -3,6 +3,7 @@ using System.CommandLine;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
+using StellaOps.Cli.Commands.Admin;
 using StellaOps.Cli.Commands.Proof;
 using StellaOps.Cli.Configuration;
 using StellaOps.Cli.Extensions;
@@ -60,6 +61,7 @@ internal static class CommandFactory
         root.Add(BuildVexCommand(services, options, verboseOption, cancellationToken));
         root.Add(BuildDecisionCommand(services, verboseOption, cancellationToken));
         root.Add(BuildCryptoCommand(services, verboseOption, cancellationToken));
+        root.Add(AdminCommandGroup.BuildAdminCommand(services, verboseOption, cancellationToken));
         root.Add(BuildExportCommand(services, verboseOption, cancellationToken));
         root.Add(BuildAttestCommand(services, verboseOption, cancellationToken));
         root.Add(BuildRiskProfileCommand(verboseOption, cancellationToken));