fix: corrects generator handlers identification

Author: mrdevrobot

Concordia.Generator/ConcordiaGenerator.cs

@@ -88,13 +88,7 @@ public void Initialize(IncrementalGeneratorInitializationContext context)
     /// <returns>The bool</returns>
     private static bool IsHandlerCandidate(SyntaxNode node)
     {
-        return node is ClassDeclarationSyntax classDeclaration &&
-               classDeclaration.BaseList != null &&
-               classDeclaration.BaseList.Types.Any(baseType =>
-                   baseType.Type is GenericNameSyntax genericName &&
-                   (genericName.Identifier.Text.Contains("RequestHandler") ||
-                    genericName.Identifier.Text.Contains("NotificationHandler") ||
-                    genericName.Identifier.Text.Contains("PipelineBehavior")));
+        return node is ClassDeclarationSyntax { BaseList: not null };
     }
 
     // Retrieves handler information from a syntax context.
@@ -115,6 +109,11 @@ baseType.Type is GenericNameSyntax genericName &&
             return null;
         }
 
+        if (classSymbol.IsAbstract)
+        {
+            return null;
+        }
+
         var implementedInterfaces = new List<string>();
 
         // Iterates through all implemented interfaces.