[FromQuery] Model binding property is filled with a random value when query doesn't contain the property

### Is there an existing issue for this? - [x] I have searched the existing issues ### Describe the bug In a dotnet9 web application, configured with `AddControllersWithViews`. ```C# //In HomeController [HttpGet("GetRequest")] public IActionResult GetRequest([FromQuery]string number, [FromQuery]RequestId requestId) { Debug.WriteLine("number = " + number); Debug.WriteLine("RequestId = " + requestId); return View("Request", requestId); } //RequestId public readonly record struct RequestId : IParsable<RequestId> { public Guid Guid { get; } = Guid.Empty; public RequestId(Guid guid) { Guid = guid; } public RequestId() { Guid = Guid.NewGuid(); } public override string ToString() { return Guid.ToString(); } public static implicit operator RequestId(Guid id) { Debugger.Break(); return new RequestId(id); } public static RequestId Default { get; } = new RequestId(Guid.Empty); public static RequestId Parse(string s, IFormatProvider? provider) { //Debugger.Break();//This is never triggered in incorrect Case return new RequestId(Guid.Parse(s, provider)); } public static bool TryParse([NotNullWhen(true)] string? s, IFormatProvider? provider, out RequestId result) { //Debugger.Break();//This is never triggered in incorrect Case if (!Guid.TryParse(s, provider, out Guid guid)) { result = Empty; return false; } result = new RequestId(guid); return true; } public static RequestId Empty { get; } = new(Guid.Empty); } ``` The issue is, if you request `http://localhost:5249/GetRequest?number=12345`, although the `requestId` parameter is missing, the output will print a random Guid. But I expects it will be a zero Guid or just throw an exception. In my production project, I use Zero Guid to detect if the parameter is valid, I can't know if it is valid when it is random. ### Expected Behavior 1. throw an exception/error 2. requestId is the default value of RequestId, which should be a empty Guid string with all zeros ### Steps To Reproduce Just run the web app and open the home page in browser, then click the link under Case02. When `number` is provided and `requestId` is not provided: http://localhost:5249/GetRequest?number=12345 but the result is that requestId is filled with a random Guid value. **minimal reproducible example project**: https://github.com/zwcloud/aspnetcore-issue-repo-model-property-filled-with-random-value/ **video**: https://github.com/user-attachments/assets/154f6df3-2cc4-44aa-8907-790c6db0c25d ### Exceptions (if any) _No response_ ### .NET Version 10.0.204 ### Anything else? Output of `dotnet --info`: ```text .NET SDK: Version: 10.0.204 Commit: e7aa4b537d Workload version: 10.0.200-manifests.b47d7e23 MSBuild version: 18.3.3+e7aa4b537 Runtime Environment: OS Name: Windows OS Version: 10.0.26200 OS Platform: Windows RID: win-x64 Base Path: C:\Program Files\dotnet\sdk\10.0.204\ .NET workloads installed: There are no installed workloads to display. Configured to use workload sets when installing new manifests. No workload sets are installed. Run "dotnet workload restore" to install a workload set. Host: Version: 10.0.8 Architecture: x64 Commit: 94ea82652c .NET SDKs installed: 8.0.422 [C:\Program Files\dotnet\sdk] 9.0.315 [C:\Program Files\dotnet\sdk] 10.0.204 [C:\Program Files\dotnet\sdk] .NET runtimes installed: Microsoft.AspNetCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 8.0.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 9.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 10.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 8.0.28 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 9.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 10.0.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 6.0.36 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 8.0.28 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 9.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 10.0.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Other architectures found: x86 [C:\Program Files (x86)\dotnet] registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation] Environment variables: DOTNET_CLI_UI_LANGUAGE [en] ```