docs(i18n): refresh persistence docs after master merge

docs/core-data-structures/persistence.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write
-persistence.md: fdbbc69813211d3b105d19af6d09cfdfc652ec7c
-persistence.zh.md: 274a8e0bdafd3e05f7f2be2db0a161bc40b12c5f
+persistence.md: dc497fd85f44660c0a981579351b5cfbe0040a4d
+persistence.zh.md: 5236f4fe2ba8ad1be7e74bffafebfea19014d7aa

docs/core-data-structures/persistence.zh.md

@@ -55,7 +55,7 @@ interface SessionHeader {
   readonly version: number
   /** The session's id (mirrors the {@link Session}'s id). */
   readonly id: SessionId
-  /** Unix epoch milliseconds when the session was created. */
+  /** Non-negative safe-integer Unix epoch milliseconds when the session was created. */
   readonly createdAt: number
   /** Absolute working directory the session was created in (if any). */
   readonly cwd?: string