Implements ADR-007 decision 2: interim single-writer, target UUIDv5 derived
from the globally unique PREFIX-WP-NNNN so writeback is idempotent across
instances. T04 migrates the 758 files carrying hub identifiers. T06 covers
lifecycle protection including the C-15 task-status override.
RMGR-WP-0004 gains T08 enforcing ADR-007 identifier uniqueness, which gates
RMGR-WP-0005-T03 — deriving from a non-unique identifier would manufacture
UUID collisions.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
