Re-inspect image after pulling outdated update (#584)

After pulling an updated image in pullImage(), re-inspect to get the
new image metadata. Previously, the inspect variable retained the old
image's SHA, so the log message on the final line reported a stale ID.

The 'image doesn't exist locally' code path already re-inspected after
pulling — this aligns the 'image exists but is outdated' path to do the
same.

Fixes #582

Author: jeffwidman

internal/infra/run.go

@@ -598,6 +598,10 @@ func pullImage(ctx context.Context, cli *client.Client, imageName string) error
 			if err != nil {
 				return fmt.Errorf("image %v is outdated, failed to pull update: %w", imageName, err)
 			}
+			inspect, err = cli.ImageInspect(ctx, imageName)
+			if err != nil {
+				return fmt.Errorf("failed to inspect image %v after pull: %w", imageName, err)
+			}
 		} else {
 			log.Printf("image %v is already up to date\n", imageName)
 		}