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

hardware/README.md

@@ -0,0 +1,79 @@
+# Hardware
+
+This directory contains all hardware designs, schematics, BOMs, and mechanical files for the KosmoConnect project.
+
+## Directory Structure
+
+```
+hardware/
+├── enviro-node/          # Solar-powered environmental station
+│   ├── pcb/              # KiCad / EasyEDA project files
+│   ├── enclosure/        # 3D models, STL files, mounting hardware
+│   ├── sensors/          # Sensor datasheets, integration notes
+│   ├── power/            # Solar panel, battery, charge controller specs
+│   └── bom/              # Bill of materials, sourcing guides
+├── infrastructure-node/  # Bridge node hardware (may be off-the-shelf)
+│   ├── off-the-shelf/    # Recommended COTS devices (T-Beam, RAK, etc.)
+│   └── custom/           # Optional custom bridge PCB designs
+└── common/               # Shared libraries, footprints, symbols
+    ├── kicad-libs/
+    └── 3d-models/
+```
+
+## Enviro-Node Hardware Overview
+
+### Brain
+- **Option A**: ESP32-S3-WROOM-1 (dual-core, WiFi/BT if needed, good dev ecosystem)
+- **Option B**: nRF52840 (lower power, native Meshtastic support, harder dev)
+
+**Decision**: Start with ESP32-S3 for rapid development; evaluate nRF52840 for v2 power optimization.
+
+### Radio
+- **Semtech SX1262** (915 MHz NA / 868 MHz EU / 433 MHz regions)
+- TCXO for stability across temperatures
+- External antenna (SMA or u.FL)
+
+### Sensors (v1)
+- **BME680**: Temperature, humidity, pressure, VOC/gas
+- **SPS30**: Particulate matter (PM1.0, PM2.5, PM4.0, PM10)
+- **Anemometer**: Davis 6410 or custom 3-cup + wind vane
+- **Rain gauge**: Optional tipping bucket (WH-SP-RG)
+
+### Power System
+- **Solar Panel**: 10W monocrystalline
+- **Battery**: 3.2V 32700 LiFePO4 6000mAh (safer than LiPo for outdoor unattended)
+- **Charge Controller**: Custom MPPT or CN3791-based board
+- **Power Management**: TPS63001 buck-boost, load switches for sensors
+
+### Enclosure
+- Polycarbonate or ABS outdoor enclosure
+- Solar panel mounted on lid or external pole
+- Glands for antenna and sensor cables
+- Passive ventilation for accurate T/H readings
+
+## Power Budget (v1 Estimate)
+
+| Component | Active Current | Sleep Current | Duty Cycle | Daily mAh |
+|-----------|---------------|---------------|------------|-----------|
+| ESP32-S3 | 80mA | 15µA | 1% | ~22 |
+| SX1262 | 10mA TX | 0.5µA | 0.1% | ~1 |
+| BME680 | 3mA | 0.15µA | 1% | ~1 |
+| SPS30 | 60mA | 0mA | 1% | ~15 |
+| Anemometer | 0mA (passive) | 0mA | 100% | 0 |
+| Quiescent | - | 0.5mA | 99% | ~12 |
+| **Total** | | | | **~51 mAh/day** |
+
+A 10W panel in winter (2h effective sun) produces ~400mAh/day. A 6000mAh battery provides ~80 days of autonomy. This is viable but tight; v2 will aggressively optimize sleep current.
+
+## Recommended Infrastructure Node Hardware
+
+For rapid deployment, use off-the-shelf Meshtastic devices:
+- **LILYGO T-Beam 868/915MHz** + ESP32 (good for WiFi/LTE backhaul)
+- **RAKwireless WisGate Edge Lite 2** (if building a dedicated gateway)
+- **Raspberry Pi 4 + RAK2287 HAT** (for a more powerful Linux-based bridge)
+
+## Design Files
+
+- [Enviro-Node v1 BOM](./enviro-node/bom/bom-v1.md) *(placeholder)*
+- [Power Budget Spreadsheet](./enviro-node/power/budget-v1.ods) *(placeholder)*
+- [Enclosure Assembly Guide](./enviro-node/enclosure/assembly-v1.md) *(placeholder)*