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/.env.example

@@ -0,0 +1,8 @@
+# 复制为仓库根目录 .env（chmod 600）；只有这一套配置
+DATABASE_URL=postgresql+asyncpg://alphapulse:<密码>@postgres:5432/alphapulse
+# DB 14 与 AFFiNE 共用，key 一律带 ap: 前缀
+REDIS_URL=redis://:<密码>@redis:6379/14
+JWT_SECRET=<openssl rand -hex 32>
+ADMIN_USERNAME=admin
+# 哈希含 $，必须用单引号包住，否则 compose 会做变量替换
+ADMIN_PASSWORD_HASH='<python -m alphapulse.core.auth hash-password 的输出>'