docs: purge chain-of-thought leakage from prose

Delete design-session citations (decision/audit/plan ordinals, stack
positions), change narration, review choreography, and reviewer-addressed
justification from comments, JSDoc, docs, READMEs, Agent Notes, tests, and
generator templates; restate every affected fact as current-state contract
prose. Fix generated docs at their sources and regenerate the catalogs and
cordis-surface regions; re-paste type-equiv blocks; update every bilingual
counterpart and re-record the pairs. Record the citation rule in the
committed-artifact-citations Agent Note.

packages/todo/tool-todo/src/index.ts

@@ -143,7 +143,6 @@ export function apply(ctx: Context, config: Config): void {
         return state
       },
       view: state => state,
-      // Fold semantics changed: turn/start clears the standing plan (was last-write-wins only).
       stateVersion: 2,
     })
   })