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/llm/llm-pi-ai/src/catalog.ts

@@ -62,8 +62,7 @@ type PiThinkingFormat = NonNullable<OpenAICompletionsCompat['thinkingFormat']>
 
 /**
  * pi-ai thinking formats a profile cannot name: both drive the request through
- * `chatTemplateKwargs`, which this configuration does not expose, so offering
- * them would hand back a format with nothing to say.
+ * `chatTemplateKwargs`, which this configuration does not expose.
  */
 type WithheldThinkingFormat = 'chat-template' | 'qwen-chat-template'
 
@@ -467,10 +466,8 @@ export function resolveRouteModels(request: RouteCatalogRequest): RouteCatalog {
       // The installed entry lays the floor, and the fields below override it.
       // Enumerating instead would silently drop every `Model` field this
       // package does not model — reasoning-level spellings, compatibility
-      // quirks, model headers, and whatever a pi-ai upgrade adds next. That is
-      // not hypothetical: `headers` reached this file only after an nvidia
-      // route lost it, and a rebuild keeps re-earning that bug on every
-      // upgrade.
+      // quirks, model headers, and whatever a pi-ai upgrade adds next. Spread,
+      // never enumerate.
       ...base,
       id: entry.id,
       name: entry.name ?? base?.name ?? entry.id,