Add Authority Advisory AI and API Lifecycle Configuration

- Introduced AuthorityAdvisoryAiOptions and related classes for managing advisory AI configurations, including remote inference options and tenant-specific settings.
- Added AuthorityApiLifecycleOptions to control API lifecycle settings, including legacy OAuth endpoint configurations.
- Implemented validation and normalization methods for both advisory AI and API lifecycle options to ensure proper configuration.
- Created AuthorityNotificationsOptions and its related classes for managing notification settings, including ack tokens, webhooks, and escalation options.
- Developed IssuerDirectoryClient and related models for interacting with the issuer directory service, including caching mechanisms and HTTP client configurations.
- Added support for dependency injection through ServiceCollectionExtensions for the Issuer Directory Client.
- Updated project file to include necessary package references for the new Issuer Directory Client library.

src/Authority/StellaOps.Authority/StellaOps.Authority.Plugins.Abstractions/AuthorityClientMetadataKeys.cs

@@ -1,11 +1,11 @@
-namespace StellaOps.Authority.Plugins.Abstractions;
-
-/// <summary>
-/// Well-known metadata keys persisted with Authority client registrations.
-/// </summary>
-public static class AuthorityClientMetadataKeys
-{
-    public const string AllowedGrantTypes = "allowedGrantTypes";
+namespace StellaOps.Authority.Plugins.Abstractions;
+
+/// <summary>
+/// Well-known metadata keys persisted with Authority client registrations.
+/// </summary>
+public static class AuthorityClientMetadataKeys
+{
+    public const string AllowedGrantTypes = "allowedGrantTypes";
     public const string AllowedScopes = "allowedScopes";
     public const string Audiences = "audiences";
     public const string RedirectUris = "redirectUris";
@@ -14,4 +14,5 @@ public static class AuthorityClientMetadataKeys
     public const string Tenant = "tenant";
     public const string Project = "project";
     public const string ServiceIdentity = "serviceIdentity";
+    public const string RequiresAirGapSealConfirmation = "requiresAirgapSealConfirmation";
 }