Add support for description field

[MaryanneNjeri]

• Add support for description field.
• Update to the latest app-configuration-js-sdk.
• Update test to verify support for the description field.

[Copilot]

Pull request overview

This PR adds support for the description field when importing configuration settings, updates the Azure App Configuration SDK dependency, and extends unit tests to validate description propagation.

Changes:

• Plumbs description through KVSet parsing and iterable configuration sources.
• Updates unit test fixtures/specs to assert description is preserved.
• Bumps @azure/app-configuration dependency to a newer version.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
libraries/azure-app-configuration-importer/tests/utlis.ts	Updates mocked ConfigurationSetting fixtures to include description.
libraries/azure-app-configuration-importer/tests/sources/kvset.json	Adds description fields to KVSet test source data.
libraries/azure-app-configuration-importer/tests/kvSetConfigurationSettingsConverter.spec.ts	Asserts KVSet conversion preserves description.
libraries/azure-app-configuration-importer/tests/iterableConfigurationSettingsSource.spec.ts	Asserts iterable source output includes description.
libraries/azure-app-configuration-importer/src/settingsImport/iterableConfigurationSettingsSource.ts	Adds description to generated settings emitted by the iterable source.
libraries/azure-app-configuration-importer/src/models.ts	Extends KvSetConfigurationItem model with optional description.
libraries/azure-app-configuration-importer/src/internal/utils.ts	Updates feature-flag comparison typing used in equality checks.
libraries/azure-app-configuration-importer/src/internal/parsers/kvSetConfigurationSettingsConverter.ts	Passes through description from KVSet items into SetConfigurationSettingParam.
libraries/azure-app-configuration-importer/package.json	Updates @azure/app-configuration dependency version.
common/config/rush/pnpm-lock.yaml	Updates lockfile entries for the new SDK version and transitive deps.

Files not reviewed (1)

• common/config/rush/pnpm-lock.yaml: Generated file

Comments suppressed due to low confidence (1)

libraries/azure-app-configuration-importer/src/internal/utils.ts:55

• isConfigSettingEqual does not compare description, so a setting whose only change is a description update will be treated as equal and will not be updated on the server. This defeats the new description-field support (updates would be skipped).

    valueIsEqual = isFeatureFlagValueEqual(settingA.value as string | MsFeatureFlagValue, settingB.value);
  }

  return valueIsEqual &&
    settingA.contentType == settingB.contentType &&

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