feat(auth): add Redis authorization caching

Tiku.Infrastructure/Security/RequestAccessValidator.cs

@@ -0,0 +1,16 @@
+using Tiku.Application.Auth;
+using Tiku.Application.Security;
+using Tiku.Domain.Tenancy;
+
+namespace Tiku.Infrastructure.Security;
+
+internal sealed class RequestAccessValidator(IAuthSessionStore sessionStore) : IRequestAccessValidator
+{
+    public Task<AuthSessionValidationResult?> ValidateAsync(
+        Guid sessionId,
+        Guid userId,
+        AuthRealm realm,
+        Guid? tenantId,
+        CancellationToken cancellationToken = default) =>
+        sessionStore.ValidateAccessSessionAsync(sessionId, userId, realm, tenantId, cancellationToken);
+}