chore: update dependency google.cloud.entityframeworkcore.spanner to 3.9.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
Google.Cloud.EntityFrameworkCore.Spanner	3.8.0 → 3.9.0

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Release Notes

cloudspannerecosystem/dotnet-spanner-entity-framework (Google.Cloud.EntityFrameworkCore.Spanner)

v3.9.0: Google.Cloud.EntityFrameworkCore.Spanner: v3.9.0

Compare Source

Features

• async DDL execution (#​664) (03598af)
• index column ordering in migrations (#​665) (dbdb211), closes #​631 #​630
• InterleaveIn for indexes (#​666) (9b01ba9), closes #​634

Bug Fixes

• session leak for empty transaction with tag (#​667) (519f393), closes #​635

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[gemini-code-assist]

Summary of Changes

Hello @renovate-bot, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request upgrades the Google.Cloud.EntityFrameworkCore.Spanner dependency to its latest 3.9.0 version. This update incorporates several new features, including asynchronous DDL execution and enhanced index management capabilities, alongside a crucial bug fix addressing a session leak. The change ensures the project benefits from the most recent improvements and stability fixes provided by the Spanner Entity Framework Core provider.

Highlights

• Dependency Update: Updates the Google.Cloud.EntityFrameworkCore.Spanner package from version 3.8.0 to 3.9.0.
• New Features: Introduces asynchronous DDL execution, support for index column ordering in migrations, and InterleaveIn functionality for indexes.
• Bug Fix: Resolves a session leak issue that occurred with empty transactions using tags.

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[gemini-code-assist]

Code Review

This pull request updates the Google.Cloud.EntityFrameworkCore.Spanner dependency to version 3.9.0. However, this change as-is introduces a critical build failure. The QuickStart project targets netcoreapp3.1, which is incompatible with the new dependency version that targets net8.0. To resolve this, the project's target framework must also be updated to net8.0. Please see the specific comment for details.

[gemini-code-assist]

This dependency update introduces a build failure. The QuickStart project targets netcoreapp3.1 (see line 5), but version 3.9.0 of the Google.Cloud.EntityFrameworkCore.Spanner package is built for net8.0. A project cannot consume a NuGet package that targets a newer .NET version. To fix this, the TargetFramework for this project needs to be updated to net8.0.