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/tests/api-proxy-cold.spec.ts

@@ -365,10 +365,10 @@ describe('subagent ownership fence', () => {
       inspect: () => Promise.resolve({ meta, events }),
       locate: () => undefined,
     } as never)
-    // Pre-#1569 stores classify a child only through the descriptor event and
-    // carry no header `origin`; the pre-release decision stops recognizing
-    // them, so the ownership fence lets generic resume reach the registry
-    // instead of answering `agent-busy`.
+    // Stores whose headers predate `origin` classify a child only through the
+    // descriptor event; the pre-release decision stops recognizing them, so
+    // the ownership fence lets generic resume reach the registry instead of
+    // answering `agent-busy`.
     const resume = vi.spyOn(ctx.agents, 'resume')
       .mockRejectedValue(new Error('registry unavailable in this bench'))
     const api = createApiProxy(ctx, { defaultModelSelection: () => ({ provider: 'p', model: 'm' }), cwd: '/tmp', workspaceRoot: '/tmp' })