fix(workplans): qualify ad-hoc identifiers with the repository prefix

`ADHOC-YYYY-MM-DD` is unique per date but not per repository, so any two repos
opening an ad-hoc on the same day collide. The 2026-08-26 fleet projection
reset refused 9 records for exactly this reason.

Canon (work-record-types_v0.1, CUST-WP-0066) settled the form as
`{PREFIX}-WP-ADHOC-YYYY-MM-DD`, filename unchanged, and grandfathered existing
ids on the condition they are never *silently* re-derived. This is the explicit
migration that clause allows for.

The hub id is derived from the record id, so a changed id is a different
record: stale state_hub_*_id fields are dropped and fix-consistency re-derives.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

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

workplans/ADHOC-2026-06-14.md

@@ -1,5 +1,5 @@
 ---
-id: ADHOC-2026-06-14
+id: BRIDGE-WP-ADHOC-2026-06-14
 type: workplan
 title: "Ad hoc ops-bridge fixes for 2026-06-14"
 domain: custodian
@@ -9,16 +9,14 @@ owner: codex
 topic_slug: ops-bridge
 created: "2026-06-14"
 updated: "2026-06-14"
-state_hub_workstream_id: "fbc2ef7e-626f-4c6a-bdf8-c69bf29097ce"
 ---
 
 ## Fix haskelseed bridge diagnostics
 
 ```task
-id: ADHOC-2026-06-14-T01
+id: BRIDGE-WP-ADHOC-2026-06-14-T01
 status: done
 priority: medium
-state_hub_task_id: "ffe6b8d8-889c-4ec4-8b64-00b77f86e39f"
 ```
 
 `haskelseed` is an Alpine host without `ss`, so `bridge check` reported
@@ -37,10 +35,9 @@ Verification:
 ## Make default target safe and add setup
 
 ```task
-id: ADHOC-2026-06-14-T02
+id: BRIDGE-WP-ADHOC-2026-06-14-T02
 status: done
 priority: medium
-state_hub_task_id: "3b932955-0d75-4b95-9821-92bfa2dadbd0"
 ```
 
 Changed `make` to default to a help listing that only shows targets with