Add REST API endpoints for the PlantLineageAgent:
- GET /api/agents/lineage - Agent status and network statistics
- POST /api/agents/lineage - Start/stop/pause/resume agent
- GET /api/agents/lineage/[plantId] - Lineage analysis for specific plant
- GET /api/agents/lineage/anomalies - List detected lineage anomalies
Includes comprehensive test suite with 25 passing tests.
