v0.8.1

fix(agent-ops): bound connectors follow move_element / update_element.

When the agent moved an element (or repositioned it) via the headless ops, a connector linking it to another element did not follow — while the interactive layer re-routes connectors after every drag/resize. The two ops now call engine.refreshConnectors() after mutating, so a connector always follows its endpoints. Patch, no API change. PR #24.