“For Hell and the foul fiend that rules God's everlasting fiery jails (Devised by rogues, dreaded by fools), With his grim, grisly dog that keeps the door, Are senseless stories, idle tales, Dreams, whimseys, and no more.”
This compatibility route stays active for legacy URLs. If a legacy slug cannot exist in the canonical author table (due to uniqueness constraints), we resolve it via an alias map.