[TypeSpec] Generate SDK for TypeSpec project specification/cognitiveservices/CognitiveServices.Management

## SDK generate request for TypeSpec project specification/cognitiveservices/CognitiveServices.Management

Request to generate SDK by Copilot. **Do not release SDK**
SDK will be released later by service owner.

**Release Plan**: [2138](https://web.powerapps.com/apps/821ab569-ae60-420d-8264-d7b5d5ef734c?release-plan-id=9e85df93-3629-f111-8341-6045bd0a804f)
**TypeSpec project path**: specification/cognitiveservices/CognitiveServices.Management
**API spec pull request link**: [https://github.com/Azure/azure-rest-api-specs/pull/39202](https://github.com/Azure/azure-rest-api-specs/pull/39202)
**SDK release type**: Beta
**API spec version**: 2026-01-15-preview
**Spec Type**: TypeSpec
**Language**: JavaScript,.NET,Java,Python,Go
**Release plan work item ID**: 33611

**Contacts**:
markhiet

**Notes**:
SDK is generated by GitHub agent workflow

Generate SDK for the TypeSpec project and update the generated SDK details in the release plan using release plan work item. Generate a summary and update it back in the linked GitHub issue once SDK pull requests are generated.

Start with the TypeSpec project at specification/cognitiveservices/CognitiveServices.Management and review API spec pull request 39202. Follow the GitHub agent workflow to generate the JavaScript, .NET, Java, Python, and Go SDK pull requests, then update release plan work item 33611 and post the generation summary here; do not release the SDK.

Written by the indexing model from the issue text.