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/host/apiproxy/src/api-proxy.ts

@@ -1421,8 +1421,8 @@ export function createApiProxy(ctx: Context, defaults: ApiProxyDefaults): ApiPro
     sessions: {
       // Attached sessions summarize from memory; persisted-but-unattached (cold)
       // sessions merge in from the persistence store so history survives restarts.
-      // Legacy logs without a cwd (pre-project stance) are not served — every
-      // session now records its project at create time.
+      // Logs without a cwd are not served; every session records its project
+      // at create time.
       async list(request) {
         return ok(request, { items: await listVisibleSessionSummaries() })
       },
@@ -2184,7 +2184,7 @@ export function createApiProxy(ctx: Context, defaults: ApiProxyDefaults): ApiPro
 
     host: {
       describe(request) {
-        // TODO(step2): version should read apps/cli's package.json; placeholder for now.
+        // TODO: version should read apps/cli's package.json; placeholder for now.
         const selection = defaults.defaultModelSelection()
         return Promise.resolve(ok(request, {
           version: '0.0.1',