feat: initial KosmoConnect platform v0.1

Includes:
- Backend services: ingestion (:8001), weather API (:8002),
  gateway (:8003), billing (:8004) with BTCPay integration
- Shared asyncpg pool, TimescaleDB hypertable, Redis, Mosquitto MQTT
- React frontend: Dashboard (MapLibre) and Messaging (chat UI)
- Bridge daemon for Pi + Meshtastic (Serial/TCP T-Deck support)
- Production Docker Compose, Nginx reverse proxy, ops scripts
- DEPLOY.md with step-by-step deployment guide

backend/requirements.txt

@@ -0,0 +1,20 @@
+# KosmoConnect Backend Dependencies
+fastapi==0.111.0
+uvicorn[standard]==0.30.0
+pydantic==2.11.3
+pydantic-settings==2.8.1
+
+# Database
+asyncpg==0.30.0
+
+# MQTT
+aiomqtt==2.3.0
+
+# HTTP client (for inter-service calls, webhooks)
+httpx==0.27.0
+
+# Utilities
+python-dateutil==2.9.0
+
+# Simulator script
+paho-mqtt==2.1.0