Dependencies: Updates to .NET 10 RC and NPoco 6.1

[AndyButland]

In this PR I've updated the .NET 10 dependency from the latest preview to the release candidate. There was one binary breaking change to fix, which was done in DeliveryApiItemsEndpointsMatcherPolicy.

A runtime error came up too, on many management API endpoints where data was retrieved with an exception thrown in ExpressionVisitorBase.VisitMethodCall of Specified argument was out of the range of valid values. (Parameter 'No logic supported for op_Implicit').

It seems this comes about due to a change in .NET 10, where if we call Contains on an array we generate an expression that can't be converted to SQL.

I.e. this will blow-up:

var userNames = new[] { "hello@world.com", "blah@blah.com" };
Expression<Func<IUser, bool>> predicate = user => userNames.Contains(user.Username);

But this is OK.

var userNames = new List<string> { "hello@world.com", "blah@blah.com" };
Expression<Func<IUser, bool>> predicate = user => userNames.Contains(user.Username);

So I think the solution here is just to ensure we use a List rather than an array when providing arguments to Contains when used in a SQL expression. Via combination of our automated tests and manual checks I think I've found everywhere that needs this and updated.

You can see more notes on this in the comments on the ExpressionTests.Sql_In unit test.

Lastly I took the opportunity to upgrade to NPoco 6.1, and fixed the binary breaking changes involved with that (mostly around nullability).

[Copilot]

Pull Request Overview

This PR updates NPoco from version 5.7.1 to 6.1.0, a major version upgrade that introduces breaking changes. The update addresses compatibility issues with .NET 10 where array usage with Contains expressions breaks expression translation in NPoco.

Key changes include:

• Replacing array initializations with List initializations where Contains expressions are used
• Updating NPoco-related interface implementations and method signatures to match the new API
• Fixing null-safety issues and modernizing code patterns
• Addressing breaking changes in async method signatures that now require CancellationToken parameters

Reviewed Changes

Copilot reviewed 51 out of 51 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
Directory.Packages.props	Updates NPoco and NPoco.SqlServer package versions from 5.7.1 to 6.1.0
global.json	Updates .NET SDK version to support the new NPoco requirements
Multiple test files	Converts array usage to List in Contains expressions to fix expression tree translation
Multiple repository files	Updates null-safety patterns and removes null-conditional operators where AmbientScope is guaranteed
NotificationsRepository.cs	Changes CreateNotification to TryCreateNotification pattern with out parameter
TestDatabase.cs	Implements new NPoco 6.x async method signatures with CancellationToken parameters
Various infrastructure files	Adds type aliases to resolve ambiguity between NPoco and Umbraco mapper collections

[nikolajlauridsen]

Looks good, and tests good to me, I found one minor thing and a missed ToList but otherwise looks good 👍