fix(workplans): declare records the hub already holds as workplans

Canon defines six work-record kinds — workplan, task, intake, decision,
engagement, register-entry. These files declared none of them (feature, runbook,
bug-report, extension-workplan, scorecard, session-note, adhoc) while the hub
held each as a workplan.

Selection is by 'type: workplan', so the mismatch made them invisible to any
projection: a forge-derived reset read their correct hub records as no longer
deriving and proposed retiring live work.

Where a file also lacked a canonical identifier, one was assigned continuing the
repository's sequence. Existing hub identifiers are preserved, so no record is
orphaned.

Refs STATE-WP-0083

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

workplans/archived/260518-PMEM-MATURITY-SCORECARD.md

@@ -1,6 +1,6 @@
 ---
-id: PMEM-MATURITY-SCORECARD
-type: scorecard
+id: PMEM-WP-0018
+type: workplan
 title: "Phase Memory Maturity Scorecard"
 domain: markitect
 repo: phase-memory