Phase 9: scaffold remote server (Flask + Postgres, docker-compose for unraid)

- server/sql/init.sql: devices/tracking_points/dashcam_files schema
- server/modules/db.py: psycopg3 pool + query helpers
- server/modules/auth.py: X-Device-Name/X-Api-Key header auth
- server/app.py: /health, /api/v1/tracking/batch, /api/v1/dashcam/upload
- server/Dockerfile + docker-compose.yml: api (gunicorn) + postgres services
- server/scripts/create_device.py: one-time device/API-key registration
- server/README.md: unraid deployment + Cloudflare Tunnel exposure docs
- PLAN.md: Phase 9 marked in progress with full build notes

Co-authored-by: Copilot <[email protected]>

server/.env.example

@@ -0,0 +1,21 @@
+# Copy this file to .env and fill in real values before running
+# `docker compose up -d`. .env itself is gitignored - never commit real
+# credentials.
+
+# Postgres credentials (internal to the compose network only, never exposed
+# to the LAN/internet - pick any strong password).
+POSTGRES_DB=yarisobd
+POSTGRES_USER=yarisobd
+POSTGRES_PASSWORD=changeme
+
+# Host port the Flask API is published on (this is what you point the
+# Cloudflare Tunnel / router port-forward at).
+API_PORT=8098
+
+# Where Postgres data + uploaded dashcam files are stored on the unraid host.
+# Recommended: a path on the array, e.g. /mnt/user/appdata/yaris-obd-server
+DATA_DIR=./data
+
+# Reject dashcam uploads larger than this (MB). Bump if your dashcam
+# produces very large individual clips.
+MAX_DASHCAM_UPLOAD_MB=2048