feat: Implement console session management with tenant and profile handling

- Add ConsoleSessionStore for managing console session state including tenants, profile, and token information.
- Create OperatorContextService to manage operator context for orchestrator actions.
- Implement OperatorMetadataInterceptor to enrich HTTP requests with operator context metadata.
- Develop ConsoleProfileComponent to display user profile and session details, including tenant information and access tokens.
- Add corresponding HTML and SCSS for ConsoleProfileComponent to enhance UI presentation.
- Write unit tests for ConsoleProfileComponent to ensure correct rendering and functionality.

src/StellaOps.Concelier.Core/Aoc/ConcelierAocGuardException.cs

@@ -0,0 +1,32 @@
+using System.Collections.Immutable;
+using StellaOps.Aoc;
+
+namespace StellaOps.Concelier.Core.Aoc;
+
+/// <summary>
+/// Represents an Aggregation-Only Contract violation produced while validating a raw advisory document.
+/// </summary>
+public sealed class ConcelierAocGuardException : Exception
+{
+    public ConcelierAocGuardException(AocGuardResult result)
+        : base("AOC guard validation failed for the provided raw advisory document.")
+    {
+        Result = result ?? throw new ArgumentNullException(nameof(result));
+    }
+
+    /// <summary>
+    /// Guard evaluation result containing the individual violations.
+    /// </summary>
+    public AocGuardResult Result { get; }
+
+    /// <summary>
+    /// Collection of violations returned by the guard.
+    /// </summary>
+    public ImmutableArray<AocViolation> Violations => Result.Violations;
+
+    /// <summary>
+    /// Primary error code (`ERR_AOC_00x`) associated with the guard failure.
+    /// </summary>
+    public string PrimaryErrorCode =>
+        Violations.IsDefaultOrEmpty ? "ERR_AOC_000" : Violations[0].ErrorCode;
+}