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

.github/workflows/ci.yml

@@ -0,0 +1,63 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  # Placeholder CI jobs to be expanded as components are implemented
+  lint-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Lint Markdown
+        uses: DavidAnson/markdownlint-cli2-action@v14
+        with:
+          globs: '**/*.md'
+        continue-on-error: true
+
+  build-firmware:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install PlatformIO
+        run: pip install platformio
+      - name: Build enviro-node firmware
+        run: |
+          echo "Firmware build not yet implemented"
+          # cd firmware/enviro-node && pio run
+        continue-on-error: true
+
+  test-backend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: Install dependencies
+        run: |
+          echo "Backend tests not yet implemented"
+          # pip install -r backend/api/requirements-dev.txt
+        continue-on-error: true
+
+  test-web:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+      - name: Install dependencies
+        run: |
+          echo "Web tests not yet implemented"
+          # cd web/dashboard && npm ci && npm run lint
+        continue-on-error: true