Entity Service: Batch GetAllPaths queries to avoid SQL Server parameter limit (closes #22470)

[AndyButland]

Description

#22470 identifies a repository method that uses WHERE IN (...) where we need to retrieve in groups to avoid risking exceeding SQL Servers maximum parameter count.

Both overloads (by int[] IDs and Guid[] keys) now batch using SelectByGroups with Constants.Sql.MaxParameterCount, matching the fix pattern from other PRs such as #22340.

Added explicit integration tests in a dedicated test class that verify batched retrieval works for both overloads

Testing

This fix can be verified by running the two new integration tests: EntityServiceGetAllPathsTests.GetAllPaths_By_Ids_Returns_All_Paths_In_Batches and EntityServiceGetAllPathsTests.GetAllPaths_By_Keys_Returns_All_Paths_In_Batches. Both tests fail without the fix when run against SQL Server (LocalDb).

I've marked both tests as explicit as they take a while to run and, beyond verifying this fix, we don't need them running on the pipeline.

[Copilot]

Pull request overview

This PR prevents SQL Server “too many parameters” failures when retrieving entity paths for large ID/key collections by batching GetAllPaths queries in the infrastructure EntityRepository, aligning with the existing Constants.Sql.MaxParameterCount safeguard pattern. It also adds explicit integration tests to reproduce/validate the behavior when running against SQL Server (LocalDb).

Changes:

• Batch EntityRepository.GetAllPaths(...) for both int[] and Guid[] overloads using SelectByGroups(..., Constants.Sql.MaxParameterCount).
• Add explicit (manual) integration tests that create 2110 items and assert all paths are returned for both overloads.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/Umbraco.Infrastructure/Persistence/Repositories/Implement/EntityRepository.cs	Batches WhereIn queries for large ID/key sets to stay below SQL Server parameter limits.
tests/Umbraco.Tests.Integration/Umbraco.Infrastructure/Services/EntityServiceGetAllPathsTests.cs	Adds explicit integration tests to validate batched GetAllPaths retrieval for IDs and keys.