Aligns Lambda entry point with HTTP API v2

Updates the ASP.NET Core Lambda entry point to use API Gateway HTTP API v2, aligning with the serverless configuration's HttpApi event type. Ensures request/response mapping compatibility and prevents format mismatches when invoking through HttpApi.

Improves deployment consistency and reduces integration friction with the configured AWS infrastructure.

Author: ksigWyatt

API/ThriveChurchOfficialAPI/ThriveChurchOfficialAPI/LambdaEntryPoint.cs

@@ -30,8 +30,9 @@ namespace ThriveChurchOfficialAPI
     /// <summary>
     /// Lambda entry point that wraps the ASP.NET Core application.
     /// This allows the same controllers, services, and repositories to run in AWS Lambda.
+    /// Uses HTTP API v2 format (APIGatewayHttpApiV2ProxyFunction) to match serverless.template's HttpApi event type.
     /// </summary>
-    public class LambdaEntryPoint : APIGatewayProxyFunction
+    public class LambdaEntryPoint : APIGatewayHttpApiV2ProxyFunction
     {
         /// <summary>
         /// Initialize the Lambda function with the ASP.NET Core Startup class.