v0.19: Realtime agent event bus

Your team's activity is now visible the moment it happens — agent messages, session starts, and epic handoffs travel the sidebar in realtime.

Highlights

• Event bus — watch your team work in realtime: agent messages, session starts, and epic handoffs.
• Chat — stale "Idle" activity badges are gone; agent activity now shows through the event bus instead.
• Notifications — smart notifications improvements.
• Cloud — event forwarding is enabled by default for new projects.
• Runtime — switched to SQLite's Node-API driver on Node 24.

Install or update with npm install -g devchain-cli.