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

backend/src/alphapulse/crawler/events.py

@@ -0,0 +1,41 @@
+import json
+import uuid
+
+from sqlalchemy import insert
+
+from alphapulse.core.db import SessionLocal
+from alphapulse.core.redis import KEY_PREFIX, redis
+from alphapulse.models import CrawlLog
+
+LOG_CHANNEL = f"{KEY_PREFIX}pub:logs"
+NEWS_CHANNEL = f"{KEY_PREFIX}pub:news"
+CONTROL_CHANNEL = f"{KEY_PREFIX}ctl:crawler"
+STATUS_KEY = f"{KEY_PREFIX}crawler:status"
+
+
+def start_urls_key(source_code: str) -> str:
+    return f"{KEY_PREFIX}{source_code}:start_urls"
+
+
+async def write_logs(rows: list[tuple[str, uuid.UUID | None, str, str]]) -> None:
+    """rows: (source_code, run_id, level, message)；落库后再发布，前端拿到的日志都带 id"""
+    if not rows:
+        return
+    async with SessionLocal() as session:
+        result = await session.execute(
+            insert(CrawlLog).returning(CrawlLog.id, CrawlLog.ts),
+            [{"source_code": s, "run_id": r, "level": lv, "message": m} for s, r, lv, m in rows],
+        )
+        saved = result.all()
+        await session.commit()
+    async with redis.pipeline(transaction=False) as pipe:
+        for (source_code, run_id, level, message), (log_id, ts) in zip(rows, saved, strict=True):
+            pipe.publish(LOG_CHANNEL, json.dumps({
+                "id": log_id,
+                "source_code": source_code,
+                "run_id": str(run_id) if run_id else None,
+                "ts": ts.isoformat(),
+                "level": level,
+                "message": message,
+            }, ensure_ascii=False))
+        await pipe.execute()