ICW E2:S15:T01 Implementation Plan

1. Codify publication contract in IPW/RW/Kanban governance docs.
2. Implement deterministic validator validate_ipw_publication_wiring.py.
3. Add regression coverage for wired/missing/not-applicable paths.
4. Wire T01 task doc to this planning package.
5. Produce an inventory + phased backfill plan and record links in BR-066/T01.