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

scripts/simulate-bridge.py

@@ -0,0 +1,83 @@
+#!/usr/bin/env python3
+"""
+Simulate an infrastructure node publishing environmental data to MQTT.
+Use this to test the ingestion pipeline and dashboard without real hardware.
+"""
+
+import json
+import random
+import time
+import argparse
+from datetime import datetime, timezone
+
+import paho.mqtt.client as mqtt
+
+
+NODE_IDS = ["!a1b2c3d4", "!b2c3d4e5", "!c3d4e5f6"]
+NODE_COORDS = {
+    "!a1b2c3d4": (49.82, 18.26),   # Ostrava-ish
+    "!b2c3d4e5": (49.75, 18.20),   # Nearby
+    "!c3d4e5f6": (49.78, 18.35),   # Nearby
+}
+
+
+def make_payload(node_id: str):
+    now = datetime.now(timezone.utc).isoformat()
+    lat, lon = NODE_COORDS.get(node_id, (50.0, 14.0))
+    return {
+        "type": "enviro_reading",
+        "node_id": node_id,
+        "received_at": now,
+        "hop_count": random.randint(1, 3),
+        "lat": lat,
+        "lon": lon,
+        "payload": {
+            "time": now,
+            "node_id": node_id,
+            "temperature_c": round(random.uniform(15.0, 25.0), 2),
+            "humidity_percent": round(random.uniform(40.0, 80.0), 2),
+            "pressure_pa": round(random.uniform(100800.0, 102000.0), 2),
+            "wind_speed_ms": round(random.uniform(0.0, 12.0), 1),
+            "wind_direction": random.randint(0, 359),
+            "pm25_ugm3": round(random.uniform(5.0, 35.0), 1),
+            "pm10_ugm3": round(random.uniform(10.0, 50.0), 1),
+            "gas_resistance_kohm": round(random.uniform(50.0, 200.0), 1),
+            "battery_voltage": round(random.uniform(3.2, 4.2), 2),
+            "solar_voltage": round(random.uniform(4.5, 6.0), 2),
+        },
+    }
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Simulate KosmoConnect bridge node")
+    parser.add_argument("--host", default="localhost", help="MQTT broker host")
+    parser.add_argument("--port", type=int, default=1883, help="MQTT broker port")
+    parser.add_argument("--topic", default="kosmo/ingest/enviro", help="MQTT topic")
+    parser.add_argument("--interval", type=int, default=10, help="Seconds between messages")
+    parser.add_argument("--count", type=int, default=0, help="Number of messages to send (0=forever)")
+    args = parser.parse_args()
+
+    client = mqtt.Client(mqtt.CallbackAPIVersion.VERSION2)
+    client.connect(args.host, args.port, 60)
+    client.loop_start()
+
+    print(f"Connected to {args.host}:{args.port}. Publishing to {args.topic} every {args.interval}s")
+
+    sent = 0
+    try:
+        while args.count == 0 or sent < args.count:
+            node_id = random.choice(NODE_IDS)
+            payload = make_payload(node_id)
+            client.publish(args.topic, json.dumps(payload))
+            print(f"[{sent+1}] Published for {node_id}")
+            sent += 1
+            time.sleep(args.interval)
+    except KeyboardInterrupt:
+        print("\nStopped by user.")
+    finally:
+        client.loop_stop()
+        client.disconnect()
+
+
+if __name__ == "__main__":
+    main()