v0.12.0

Added

• Swimlanes — collapsible service lanes. Each service lane in the Swimlanes view can now collapse to a compact single-chain "vector" (the deployment chain ending at the service's newest event) and expand back to the full promotion DAG — via per-lane chevrons plus Collapse-all / Expand-all controls. An Auto-scroll-to-change toggle (on by default) keeps the latest change in view, and a card flashes to highlight a live status change in either state. Per-lane collapse state and the auto-scroll preference persist across reloads (lanes start collapsed). This is a Swimlanes-view enhancement only — no API or contract change.