Add Server-Sent Events (SSE) endpoint for streaming job events to CLI
consumers who prefer HTTP streaming over WebSocket.
Endpoint: GET /runner-jobs/:id/events/stream
Features:
- Database polling (500ms interval) for new events
- Keep-alive pings (15s interval) to prevent timeout
- Auto-cleanup on connection close or job completion
- Authentication required (workspace member)
- SSE format: event: <type>\ndata: <json>\n\n
Implementation:
- Added streamEvents method to RunnerJobsService
- Added streamEvents endpoint to RunnerJobsController
- Comprehensive unit tests for both controller and service
- All quality gates pass (typecheck, lint, build, test)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>