Fix NU1605 package downgrade error for FluentValidation

[Copilot]

Description

CI failing with NU1605 due to FluentValidation version conflict: Core project referenced 11.9.0 while Contracts required ≥11.12.0, causing package downgrade during restore.

Changes:

• snglrtycrvtureofspce.Core.csproj: Upgraded FluentValidation 11.9.0 → 11.12.0
• snglrtycrvtureofspce.Core.Samples.BasicApi.csproj: Added explicit FluentValidation 11.12.0 reference

All projects now resolve to FluentValidation 11.12.0, eliminating the dependency conflict.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Additional Notes

Reference: Job 57505309974, commit fdaff8a

Original prompt

Job 57505309974 failed with NU1605 (WarningAsError): Detected package downgrade of FluentValidation from 11.12.0 to 11.9.0 (see run ref fdaff8a). Logs show the failure during dotnet restore where snglrtycrvtureofspce.Core transitively references FluentValidation 11.9.0 while snglrtycrvtureofspce.Core.Contracts requires >=11.12.0.

Goal: Create a PR that resolves the version mismatch by standardizing FluentValidation to 11.12.0 across projects in the repo so restore/build no longer fails with NU1605.

Changes to make (apply to ref fdaff8a):

1. Update src/snglrtycrvtureofspce.Core/snglrtycrvtureofspce.Core.csproj

• Replace the existing FluentValidation PackageReference Version="11.9.0" with Version="11.12.0".

Patch to apply (XML snippet):

(Place/update inside the existing ItemGroup of PackageReferences; keep other PackageReference entries unchanged.)

Reference: https://github.com/snglrtycrvtureofspce/snglrtycrvtureofspce.Core/blob/fdaff8a372cdf951ba482e54aad8aba4b602c853/src/snglrtycrvtureofspce.Core/snglrtycrvtureofspce.Core.csproj

2. Add explicit FluentValidation reference to src/snglrtycrvtureofspce.Core/snglrtycrvtureofspce.Core.Contracts/snglrtycrvtureofspce.Core.Contracts.csproj if not present

• Add an ItemGroup with PackageReference Include="FluentValidation" Version="11.12.0" to ensure the Contracts project resolves to 11.12.0 explicitly (this forces a consistent graph).

Patch to apply (XML snippet):

Reference: https://github.com/snglrtycrvtureofspce/snglrtycrvtureofspce.Core/blob/fdaff8a372cdf951ba482e54aad8aba4b602c853/src/snglrtycrvtureofspce.Core.Contracts/snglrtycrvtureofspce.Core.Contracts.csproj

3. Add explicit FluentValidation reference to samples/snglrtycrvtureofspce.Core.Samples.BasicApi/snglrtycrvtureofspce.Core.Samples.BasicApi.csproj

• Add an ItemGroup with PackageReference Include="FluentValidation" Version="11.12.0" to the sample project so transitive resolution uses 11.12.0.

Patch to apply (XML snippet):

Reference: https://github.com/snglrtycrvtureofspce/snglrtycrvtureofspce.Core/blob/fdaff8a372cdf951ba482e54aad8aba4b602c853/samples/snglrtycrvtureofspce.Core.Samples.BasicApi/snglrtycrvtureofspce.Core.Samples.BasicApi.csproj

Notes and rationale:

• The restore failure is caused by conflicting FluentValidation versions; upgrading all direct references to 11.12.0 makes the dependency graph consistent and avoids NU1605 (treated as error).
• If this repo uses centralized package management (Directory.Packages.props), consider updating that file instead; however this PR applies minimal changes to the three affected project files to fix the CI quickly.
• Do not remove TreatWarningsAsErrors; we should prefer deterministic package versions.

Please create a branch, apply these edits, run dotnet restore/build locally (CI will verify), and open a PR with a short description: "Fix: Upgrade FluentValidation to 11.12.0 across projects to resolve NU1605 downgrade". Include in the PR body the CI failure reference: job 57505309974 and ref fdaff8a.

This pull request was created as a result of the following prompt from Copilot chat.

Job 57505309974 failed with NU1605 (WarningAsError): Detected package downgrade of FluentValidation from 11.12.0 to 11.9.0 (see run ref fdaff8a). Logs show the failure during dotnet restore where snglrtycrvtureofspce.Core transitively references FluentValidation 11.9.0 while snglrtycrvtureofspce.Core.Contracts requires >=11.12.0.

Goal: Create a PR that resolves the version mismatch by standardizing FluentValidation to 11.12.0 across projects in the repo so restore/build no longer fails with NU1605.

Changes to make (apply to ref fdaff8a):

1. Update src/snglrtycrvtureofspce.Core/snglrtycrvtureofspce.Core.csproj

• Replace the existing FluentValidation PackageReference Version="11.9.0" with Version="11.12.0".

Patch to apply (XML snippet):

(Place/update inside the existing ItemGroup of PackageReferences; keep other PackageReference entries unchanged.)

Reference: https://github.com/snglrtycrvtureofspce/snglrtycrvtureofspce.Core/blob/fdaff8a372cdf951ba482e54aad8aba4b602c853/src/snglrtycrvtureofspce.Core/snglrtycrvtureofspce.Core.csproj

2. Add explicit FluentValidation reference to src/snglrtycrvtureofspce.Core/snglrtycrvtureofspce.Core.Contracts/snglrtycrvtureofspce.Core.Contracts.csproj if not present

• Add an ItemGroup with PackageReference Include="FluentValidation" Version="11.12.0" to ensure the Contracts project resolves to 11.12.0 explicitly (this forces a consistent graph).

Patch to apply (XML snippet):

Reference: https://github.com/snglrtycrvtureofspce/snglrtycrvtureofspce.Core/blob/fdaff8a372cdf951ba482e54aad8aba4b602c853/src/snglrtycrvtureofspce.Core.Contracts/snglrtycrvtureofspce.Core.Contracts.csproj

3. Add explicit FluentValidation reference to samples/snglrtycrvtureofspce.Core.Samples.BasicApi/snglrtycrvtureofspce.Core.Samples.BasicApi.csproj

• Add an ItemGroup with PackageReference Include="FluentValidation" Version="11.12.0" to the sample project so transitive resolution uses 11.12.0.

Patch to apply (XML snippet):

Reference: https://github.com/snglrtycrvtureofspce/snglrtycrvtureofspce.Core/blob/fdaff8a372cdf951ba482e54aad8aba4b602c853/samples/snglrtycrvtureofspce.Core.Samples.BasicApi/snglrtycrvtureofspce.Core.Samples.BasicApi.csproj

Notes and rationale:

• The restore failure is caused by conflicting FluentValidation versions; upgrading all direct references to 11.12.0 makes the dependency graph consistent and avoids NU1605 (treated as error).
• If this repo uses centralized package management (Directory.Packages.props), consider updating that file instead; however this PR applies minimal changes to the three affected project files to fix the CI quickly.
• Do not remove TreatWarningsAsErrors; we should prefer deterministic package versions.

Please create a branch, apply these edits, run dotnet restore/build locally (CI will verify), and open a PR with a short description: "Fix: Upgrade FluentValidation to 11.12.0 across projects to resolve NU1605 downgrade". Include in the PR body the CI failure reference: job 57505309974 and ref fdaff8a.

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