Initial AlphaPulse implementation: news crawler and Binance klines

- Backend (FastAPI, SQLAlchemy 2, Alembic): single-admin cookie auth,
  news/crawler/market APIs with SSE and WebSocket streaming
- Crawler (Scrapy + Scrapy-Redis): wscn_news, wscn_live, cls_depth,
  cls_telegraph spiders, idempotent upserts with revisions, raw response
  archiving, per-source subprocess supervision, restart and backoff
- Market worker: full-history Binance spot/USD-M kline backfill,
  realtime WS stream, hourly and on-reconnect catch-up
- Frontend (Vue 3, Element Plus, UnoCSS, KLineChart): news feed,
  crawler console with live logs, Binance-style chart page
- Deploy: docker compose, nginx site, migrate and daily backup scripts

deploy/backup.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+# 每日备份 alphapulse 库，保留最近 14 份；backrest 03:00 会把 /srv 整体备份到异地
+set -eu
+dir=/srv/AlphaPulse/backups/daily
+mkdir -p "$dir"
+target="$dir/alphapulse-$(date +%Y%m%d).dump"
+# 先写临时文件，成功后再改名，避免留下半截备份
+docker exec postgres pg_dump -U alphapulse -Fc alphapulse > "$target.tmp"
+mv "$target.tmp" "$target"
+ls -1t "$dir"/alphapulse-*.dump | tail -n +15 | xargs -r rm --
+echo "$(date '+%F %T') 备份完成：$target $(du -h "$target" | cut -f1)"