fix(workplans): restore identifiers for records already on central

A repo-wide re-key overwrote the identifiers of eight workplans that were
correctly registered, breaking their link to the live records. Restored by
matching the canonical record id against central's slugs.

Re-keying is only safe for records central does not hold.

Refs CUST-WP-0068-T06

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 2583210@bnt-lap001
Assistant-Session: f2bff2d5-e9b2-4338-92ca-10282a927006

workplans/KAIZEN-WP-0007-agent-authoring-doc-generation.md

@@ -36,7 +36,7 @@ tasks:
 - id: T06
   state_hub_task_id: 6715aa6f-1ee0-4f22-9249-f1cd41763cd1
   status: done
-  title: Docs, CLI cheat sheet, CHANGELOG for v1.4.0state_hub_workstream_id: "5f9c1707-b3f4-57d3-b45b-20e5b46ebcc7"
+  title: Docs, CLI cheat sheet, CHANGELOG for v1.4.0state_hub_workstream_id: "a8bc88a4-0ee3-44c6-aff5-9d7f54a316f5"
 ---
 
 # KAIZEN-WP-0007 — Agent Authoring & Doc Generation