ta_nken backend

Peer signaling, watch target sampling and history cache are online.

• GET /health
• GET /v1/config
• POST /v1/presence/heartbeat
• GET /v1/peers?regionKey=...
• POST /v1/signaling/message
• GET /v1/signaling/messages?peerId=...
• POST /v1/watch/register
• GET /v1/history?stationId=...&fuelType=...
• /peerjs