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>

Dockerfile

@@ -10,7 +10,6 @@ WORKDIR /app
 COPY --from=builder /app/build ./build
 COPY --from=builder /app/node_modules ./node_modules
 COPY --from=builder /app/package.json ./
-COPY --from=builder /app/drizzle ./drizzle
 COPY --from=builder /app/scripts ./scripts
 
 ENV NODE_ENV=production