Add tests and fixes to .well-known/openid-configuration and create realm

IdentityShroud.Core/Services/RealmService.cs

@@ -12,6 +12,11 @@ public class RealmService(
     Db db,
     IEncryptionService encryptionService) : IRealmService
 {
+    public Task<Realm?> FindBySlug(string slug, CancellationToken ct = default)
+    {
+        throw new NotImplementedException();
+    }
+
     public async Task<Result<RealmCreateResponse>> Create(RealmCreateRequest request, CancellationToken ct = default)
     {
         Realm realm = new()
@@ -19,10 +24,10 @@ public class RealmService(
             Id = request.Id ?? Guid.CreateVersion7(),
             Slug = request.Slug ?? SlugHelper.GenerateSlug(request.Name),
             Name = request.Name,
+            Keys = [ CreateKey() ],
         };
         
-        using RSA rsa = RSA.Create(2048);
-        realm.SetPrivateKey(encryptionService, rsa.ExportPkcs8PrivateKey());
+        
 
         db.Add(realm);
         await db.SaveChangesAsync(ct);
@@ -30,4 +35,17 @@ public class RealmService(
         return new RealmCreateResponse(
             realm.Id, realm.Slug, realm.Name);
     }
+
+    private Key CreateKey()
+    {
+        using RSA rsa = RSA.Create(2048);
+
+        Key key = new()
+        {
+            Priority = 10,
+        };
+        key.SetPrivateKey(encryptionService, rsa.ExportPkcs8PrivateKey());
+
+        return key;
+    }
 }