feat: initial Bot Intelligence API Docker stack

Self-hosted Node.js/Express + SQLite (WAL) API server and dashboard
for tracking blocked bots and user agents. Features:
- POST /api/v1/submit — batch ingest from WordPress plugin
- GET /api/v1/stats — aggregated stats with 30s cache
- GET /api/v1/stream — SSE live event feed
- GET /api/v1/health — health check endpoint
- Cyan/blue terminal-style dashboard with live feed, bar charts, 24h activity
- Docker Compose setup on port 3001 with persistent SQLite volume
- Bearer token auth with constant-time comparison

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,6 @@
+PORT=3001
+DB_PATH=/data/bots.db
+NODE_ENV=production
+# Set a strong random token — all WP sites must send this as: Authorization: Bearer <token>
+# Leave empty to run in open mode (dev only)
+API_TOKEN=change-me-to-a-long-random-string