feat(ci): add Docker image build and release workflow

* Implement GitHub Actions workflow for Docker image build and release
* Validate release tags and manage Docker login credentials
* Build and push Docker images with versioning and metadata
* Add docker-build target to Makefile for local image building

pkg/broker/worker/worker.go

@@ -218,7 +218,7 @@ func (w *Worker) processJobs(ctx context.Context) {
 
 		if jobID <= 0 {
 			tx.Rollback() // No job found, rollback
-			return         // No more jobs
+			return        // No more jobs
 		}
 
 		// Run the job