fix: labels update in queue to avoid race conditions

[vigneshrajsb]

What

To avoid race condition when adding the deploy label before the github comment is created and posted.

[Copilot]

Pull Request Overview

This PR introduces a queue-based system for managing PR label updates to prevent race conditions when adding deploy labels before GitHub comments are created and posted.

• Adds a new LabelService with a dedicated queue for handling label operations asynchronously
• Replaces direct GitHub API calls for label updates with queued jobs that can wait for comment creation
• Implements proper error handling and retry logic for label operations

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/shared/config.ts	Adds LABEL queue name configuration
src/server/services/types/index.ts	Adds LabelService to the services interface
src/server/services/label.ts	Creates new LabelService with queue-based label management
src/server/services/index.ts	Instantiates LabelService in the services factory
src/server/services/github.ts	Replaces direct label API calls with queued label jobs
src/server/jobs/index.ts	Registers the label queue worker with proper concurrency