fix: MariaDB compatibility, Docker build, and StatsCounter props

- Replace serial() with int().autoincrement() for MariaDB compatibility
- Expose DB port 3306 in docker-compose for local dev tooling
- Remove drizzle/ COPY from Dockerfile (using push, not migrations)
- Fix StatsCounter props mismatch on home page

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -7,6 +7,8 @@ services:
       MYSQL_DATABASE: fosterflow
       MYSQL_USER: fosterflow
       MYSQL_PASSWORD: ${DB_PASSWORD:-fosterflow}
+    ports:
+      - "3306:3306"
     volumes:
       - db_data:/var/lib/mysql
     healthcheck: