feat: Implement IsolatedReplayContext for deterministic audit replay

- Added IsolatedReplayContext class to provide an isolated environment for replaying audit bundles without external calls.
- Introduced methods for initializing the context, verifying input digests, and extracting inputs for policy evaluation.
- Created supporting interfaces and options for context configuration.

feat: Create ReplayExecutor for executing policy re-evaluation and verdict comparison

- Developed ReplayExecutor class to handle the execution of replay processes, including input verification and verdict comparison.
- Implemented detailed drift detection and error handling during replay execution.
- Added interfaces for policy evaluation and replay execution options.

feat: Add ScanSnapshotFetcher for fetching scan data and snapshots

- Introduced ScanSnapshotFetcher class to retrieve necessary scan data and snapshots for audit bundle creation.
- Implemented methods to fetch scan metadata, advisory feeds, policy snapshots, and VEX statements.
- Created supporting interfaces for scan data, feed snapshots, and policy snapshots.

src/Cli/StellaOps.Cli/Output/IOutputWriter.cs

@@ -0,0 +1,107 @@
+// -----------------------------------------------------------------------------
+// IOutputWriter.cs
+// Sprint: SPRINT_3850_0001_0001_oci_storage_cli
+// Description: Simple console output writer abstraction for CLI commands.
+// -----------------------------------------------------------------------------
+
+namespace StellaOps.Cli.Output;
+
+/// <summary>
+/// Output writer abstraction for CLI commands.
+/// </summary>
+public interface IOutputWriter
+{
+    /// <summary>
+    /// Write an informational message.
+    /// </summary>
+    void WriteInfo(string message);
+
+    /// <summary>
+    /// Write an error message.
+    /// </summary>
+    void WriteError(string message);
+
+    /// <summary>
+    /// Write a warning message.
+    /// </summary>
+    void WriteWarning(string message);
+
+    /// <summary>
+    /// Write a success message.
+    /// </summary>
+    void WriteSuccess(string message);
+
+    /// <summary>
+    /// Write verbose/debug output.
+    /// </summary>
+    void WriteVerbose(string message);
+
+    /// <summary>
+    /// Write raw output (no formatting).
+    /// </summary>
+    void WriteLine(string message);
+
+    /// <summary>
+    /// Write formatted output with optional label.
+    /// </summary>
+    void WriteOutput(string label, string value);
+
+    /// <summary>
+    /// Write formatted output without label.
+    /// </summary>
+    void WriteOutput(string value);
+}
+
+/// <summary>
+/// Console-based output writer implementation.
+/// </summary>
+public sealed class ConsoleOutputWriter : IOutputWriter
+{
+    public void WriteInfo(string message)
+    {
+        Console.WriteLine(message);
+    }
+
+    public void WriteError(string message)
+    {
+        Console.ForegroundColor = ConsoleColor.Red;
+        Console.Error.WriteLine($"Error: {message}");
+        Console.ResetColor();
+    }
+
+    public void WriteWarning(string message)
+    {
+        Console.ForegroundColor = ConsoleColor.Yellow;
+        Console.WriteLine($"Warning: {message}");
+        Console.ResetColor();
+    }
+
+    public void WriteSuccess(string message)
+    {
+        Console.ForegroundColor = ConsoleColor.Green;
+        Console.WriteLine(message);
+        Console.ResetColor();
+    }
+
+    public void WriteVerbose(string message)
+    {
+        Console.ForegroundColor = ConsoleColor.DarkGray;
+        Console.WriteLine(message);
+        Console.ResetColor();
+    }
+
+    public void WriteLine(string message)
+    {
+        Console.WriteLine(message);
+    }
+
+    public void WriteOutput(string label, string value)
+    {
+        Console.WriteLine($"  {label}: {value}");
+    }
+
+    public void WriteOutput(string value)
+    {
+        Console.WriteLine($"  {value}");
+    }
+}