[6.1.6] Set SqlClient 6.1.6 version numbers

[apoorvdeshmukh]

Description

Sets the version numbers in preparation for the 6.1.6 release (and the AKV Provider 6.1.3 release), following the same pattern as #4162 (6.1.5).

Changes

Microsoft.Data.SqlClient (6.1.6)

• common-variables.yml: bumped Patch 5 → 6; updated PreviewNugetPackageVersion 6.1.6-preview1 → 6.1.7-preview1
• Versions.props: MdsVersionDefault 6.1.5 → 6.1.6
• Microsoft.Data.SqlClient.AlwaysEncrypted.AzureKeyVaultProvider.nuspec: MDS dependency [6.1.5,7.0.0) → [6.1.6,7.0.0) (all TFM groups)
• StressTests Directory.Packages.props: MdsVersion 6.1.4 → 6.1.5 (last published version)

Azure Key Vault Provider (6.1.3)

• common-variables.yml: bumped akvVersionPatch 2 → 3

  The last published AKV version (6.1.2) only enabled strong-name signing. Since then the provider has accrued a dependency refresh ([6.1] Dependency Cleanup #3843 — Azure.Core 1.47.1 → 1.50.0, Azure.Security.KeyVault.Keys 4.7.0 → 4.8.0, Microsoft.Extensions.Caching.Memory → 9.0.11, removed unused System.Text.Encodings.Web, pinned dependency versions) and build fixes ([6.1] Fixes build issues for AKV Provider #4250 — strong-name signing now keys off SigningKeyPath). These are packaging/dependency changes only; no functional or API changes. Since 6.1.2 is already on NuGet, the version must move to 6.1.3.

Notes

• Shared dependencies between MDS 6.1.6 and AKV 6.1.3 (Azure.Core 1.50.0, Microsoft.Extensions.Caching.Memory) match across all target frameworks — no version conflicts.

[Copilot]

Pull request overview

Prepares the release/6.1 branch for the 6.1.6 release by updating centralized version variables/props and aligning the AKV provider’s SqlClient dependency range accordingly.

Changes:

• Updated OneBranch pipeline version variables to 6.1.6 and advanced the preview test build version to 6.1.7-preview1.
• Bumped MdsVersionDefault to 6.1.6 for package/assembly versioning.
• Updated the AKV provider .nuspec to depend on Microsoft.Data.SqlClient [6.1.6,7.0.0) and moved StressTests’ pinned package version to the latest published 6.1.5.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
eng/pipelines/onebranch/variables/common-variables.yml	Bumps patch to 6.1.6 and advances preview version for test preview builds.
tools/props/Versions.props	Updates the default SqlClient version used for package/assembly versioning to 6.1.6.
tools/specs/add-ons/Microsoft.Data.SqlClient.AlwaysEncrypted.AzureKeyVaultProvider.nuspec	Aligns AKV provider dependency range to require SqlClient 6.1.6+.
src/Microsoft.Data.SqlClient/tests/StressTests/Directory.Packages.props	Pins StressTests to the latest published package version when CI override isn’t provided.