CUST-WP-0055: finish T02/T06/T07 and close workplan

Add archive terminology note tool, extend scan allowlist for generated
trees, mark remaining tasks done, and add grandfather notes to archived
workplans in this repo.

tools/scan_workstream_allowlist.yaml

@@ -51,7 +51,16 @@ per_repo:
       - event-types/org.statehub.workstream.completed.md
 
   agentic-resources:
-    exclude_repo: true
+    path_prefixes:
+      - session_memory/.store/
+
+  repo-scoping:
+    path_prefixes:
+      - var/checkouts/
+
+  railiance-fabric:
+    path_prefixes:
+      - exports/
 
 # Wire-compat pattern buckets — always excluded from prose gate counts.
 patterns_always_allowed: