fix(workplans): adopt ADR-007 derived identifiers for unregistered records

These workplans exist only in the retired local hub. Their random pre-ADR-007
identifiers are refused by C-06 as stale references, so they cannot be
registered. Deriving from the canonical record id takes no identity from
anything: central does not hold them and the old ids die with the cache.

Records central already holds were deliberately left untouched.

Refs CUST-WP-0068-T06

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

workplans/ESRC-WP-0003-metadata-enrichment.md

@@ -13,7 +13,7 @@ spec_refs:
   - README.md
   - src/pdf/ingest.ts
   - src/pdf/metadata.ts
-state_hub_workstream_id: "831267a1-fc93-4872-a25b-73793d9c5df4"
+state_hub_workstream_id: "16444f5e-93f2-5a7f-a2f1-92284315d041"
 ---
 
 # ESRC-WP-0003 — Metadata enrichment
@@ -29,7 +29,7 @@ it into the `Document` record without breaking the pure-over-bytes contract.
 id: ESRC-WP-0003-T01
 status: done
 priority: low
-state_hub_task_id: "45eeef15-41a9-4abd-9436-ed77e2c6b3a4"
+state_hub_task_id: "01187f2c-f6fa-549e-91ad-a0acc46bcd36"
 ```
 Enumerate available PDF metadata sources (info dict, XMP) via PDF.js and decide
 precedence vs. caller-supplied options (caller wins).
@@ -38,7 +38,7 @@ precedence vs. caller-supplied options (caller wins).
 id: ESRC-WP-0003-T02
 status: done
 priority: low
-state_hub_task_id: "41ca090f-c709-420a-b7c5-8332e4e82bd1"
+state_hub_task_id: "95176499-3ae7-586d-bce4-a96c075632ab"
 ```
 Implement extraction into a normalized metadata shape; keep it optional so
 minimal-metadata PDFs still ingest cleanly.
@@ -47,7 +47,7 @@ minimal-metadata PDFs still ingest cleanly.
 id: ESRC-WP-0003-T03
 status: done
 priority: low
-state_hub_task_id: "0004881b-6577-4a62-a2ff-cbb5c4706b1b"
+state_hub_task_id: "83fa3027-61f7-5bb9-95ce-ffbe58c90ebd"
 ```
 Contract tests over the fixture corpus asserting extracted vs. overridden
 metadata precedence.