API endpoints

GET /api/health
GET /api/stats
GET /api/models
GET /api/models/:name/profiles
GET /api/documents/search?q=ECM
GET /api/documents/:id?raw=1
GET /api/dtc/search?q=ECM
GET /api/dtc/:code?raw=1
GET /api/modules
GET /api/online/agents
GET /api/online/:agentId/scan-tools
POST /api/online/:agentId/connect-tool
GET /api/online/:agentId/vin
GET /api/online/:agentId/dtc
POST /api/online/:agentId/clear
POST /api/online/:agentId/raw