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/credentials/credentials-local/src/index.ts

@@ -29,8 +29,9 @@
  * The document holds nothing but credentials, which is why it is a strict
  * `CredentialRef`-to-string mapping rather than a dotenv file: a store the
  * Harness owns and never materializes into the environment cannot also serve
- * as the user's environment layer, and conflating the two is what made a
- * non-secret in the old `$DSH_HOME/.env` silently unreachable.
+ * as the user's environment layer; a store that doubled as the environment
+ * layer would shadow non-secret entries behind its precedence, making them
+ * silently unreachable.
  * @module @deepseek-ai/dsh-credentials-local
  */