Record completed owner recovery preparation and final sync receipts

Assistant: codex
Assistant-Model: gpt-6.1-sol
Assistant-Session: 01a1029d-2c93-7500-a0e0-e3e089668b29

docs/evidence/2026-10-03-root-grant-delivery-progress.md

@@ -165,8 +165,17 @@ USER-WP-0037-T02 is done, synced HEAD `d955cd7`; runtime workplan is finished,
 synced HEAD `f108c65`. The remaining T05 gate is the attended producer recovery
 finish helper: current retained-baseline/source match plus encrypted history
 provider upload/download/decryption through the existing governed Nextcloud
-Backup lane. Eighteen producer/finish tests passed. It preserves all backups and
+Backup lane. Final producer/finish suite: 19 passed, including actual age crypto
+roundtrip against an in-memory disposable provider. It preserves all backups and
 uses a unique receipt/object. The surfaced historical backup-share URL is not
 repeated or stored here; the helper compares it with the current lane only as a
 boolean and stops for owner incident handling if they match. This unresolved
 comparison is not represented as a harmless or rotated credential.
+
+Producer synced `b8f8a7ada65f0a86b90a54812365757838102991`, exact commit
+applied on primary/railiance01, clean with ahead/behind 0. Non-authoritative
+baseline/history recovery copy in owner source `a252447058105eed0931d34f1a906f39ce7c2e5e`
+was retrieved through a fresh remote clone and matched byte-for-byte; the owner
+retains its safe remote readback receipt. Provider archive generation is
+explicitly unverified; the prepared attended direct encrypted history roundtrip
+is still required. All authorized source work is implemented and synced.