fix(orchestrator): use labeled break to correctly exit for/select on context cancel (SA4011)

Add tools.go to pin staticcheck as a module dependency so CI installs
it from the module cache instead of re-downloading on every run.

scraper/internal/orchestrator/orchestrator.go

@@ -247,10 +247,11 @@ func (o *Orchestrator) Run(ctx context.Context) error {
 		}()
 
 		var bookWG sync.WaitGroup
+	bookLoop:
 		for entry := range entries {
 			select {
 			case <-ctx.Done():
-				break
+				break bookLoop
 			default:
 			}