Aaron Donald, the defensive force who has long defined the Los Angeles Rams' identity on the field, returned to action Monday night after an absence that had quietly diminished the team's front line. His reappearance against the New York Giants was less a single game than a restoration — of pressure, of possibility, of what the Rams can be when whole. The team won, and the league took notice, understanding that a healthy Donald changes the calculus for every offense they will face in the weeks ahead.