Align policy provenance and licensing documentation

docs/roadmap/implementation.md

@@ -72,6 +72,12 @@ or copy the upstream example collection to satisfy illustrative links.
 
 ## Stage 1 — Establish provenance, orientation, and licensing ownership
 
+**Completed 2026-09-28.** Adopted pinned meta, OSS, and documentation policies,
+selective orientation, policy attribution, document-license scope, and the
+verbatim CC BY-SA 4.0 text. The local documentation-link check, whitespace
+checks, pinned license-byte comparison, metadata/link review, and staged diff
+review passed.
+
 ### Work
 
 1. Create `docs/policy/meta.md` from the pinned template, retaining its live