v0.1.3 — WebSocket Transport Migration

Breaking Changes

• Migrate all API communication from HTTP REST to WebSocket transport
• Remove HTTP route-based architecture (router, middleware, route
  handlers)

Added

• WebSocket method system (src/transport/ws-methods/) with dedicated
  handlers for pipelines, agents, sessions, artifacts, logs, timeline
• ws-handler.ts for unified WebSocket request routing
• Frontend WebSocket client (ws-client.ts) replacing HTTP-based API
  layer
• CLI WebSocket runtime client (ws-runtime-client.ts)
• Isolated dev data directory to prevent cross-environment conflicts

Changed

• All frontend entity APIs (pipeline, agent, session, artifact, run-log)
  migrated to WebSocket calls
• CLI server runtime client refactored to use WebSocket transport
• Pipeline management tests updated for new transport layer

Removed

• HTTP router, middleware, and all REST route handlers (17 route files)
• Server-side HTTP utility modules
• Legacy server contract and route tests