959a986e2c
- Add `historical_node_identity` to `DelegationWithEverything` and populate via `lookup_historical_node_identity` in `delegate.rs` so search works after unbond. - `searchDelegations` searches `historical_node_identity` and guards null/empty `node_identity` with optional chaining. - Acceptance tests: historical identity search, bonded-unbonding vs synthetic branch semantics, empty-identity search safety. - Fix linting