feat: define accountability root manifest

docs/financial-fabric-operator-guide.md

@@ -42,6 +42,14 @@ Use the legacy JSON export for compatibility with existing `STATE-WP-0050`
 State Hub behavior. Use the financial export to verify the vNext contract and
 the ownership/fabric projection.
 
+For accountability-root discovery, start from the current root manifest:
+
+```text
+fabric/discovery/railiance-accountability-roots.yaml
+```
+
+The manifest schema is documented in `docs/accountability-root-manifest.md`.
+
 The financial export must satisfy these invariants:
 
 - every accepted node has resolvable ownership;