semi implemented and features implemented save checkpoint

docs/features/unchecked/cli/stella-admin-cli-command-group.md

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+# Stella Admin CLI Command Group
+
+## Module
+Cli
+
+## Status
+IMPLEMENTED
+
+## Description
+Consolidated `stella admin` CLI command group providing administrative operations for policy management, user administration, feed management, and system diagnostics. Replaces previously scattered admin operations.
+
+## Implementation Details
+- **Command Group**: `src/Cli/StellaOps.Cli/Commands/Admin/AdminCommandGroup.cs` -- `AdminCommandGroup` (internal static class)
+- **Command Handlers**: `src/Cli/StellaOps.Cli/Commands/Admin/AdminCommandHandlers.cs` -- `AdminCommandHandlers`
+- **Backend Operations**: `src/Cli/StellaOps.Cli/Services/BackendOperationsClient.cs` / `IBackendOperationsClient.cs`
+- **Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/Services/BackendOperationsClientTests.cs`
+- **Commands**:
+  - `stella admin users list` -- list users
+  - `stella admin users create` -- create a user
+  - `stella admin policy list` -- list policies (admin view)
+  - `stella admin feeds list` -- list advisory feeds (deprecated, use config feeds)
+  - `stella admin diagnostics` -- system diagnostics
+
+## E2E Test Plan
+- [ ] Run `stella admin users list` and verify user listing
+- [ ] Run `stella admin users create --name <user>` and verify user creation
+- [ ] Run `stella admin policy list` and verify admin policy view
+- [ ] Run `stella admin diagnostics` and verify system diagnostics
+- [ ] Verify admin commands require admin role authorization