feat(alerts): 添加微信告警、WebSocket实时推送和地图功能

- 新增微信告警服务（wechat_service）和告警任务（alert_tasks）
- 新增 WebSocket 实时推送端点
- 新增监控管理模块（monitor）
- 增强统计仪表板：趋势图、区域分布、光功率历史
- 设备管理：添加坐标信息、标签系统、复合索引优化
- 前端：重构Dashboard/Charts页面，新增业务组件
- 新增5个数据库迁移（坐标、复合索引、标签、光功率历史、显示名）
- 更新部署配置和脚本
- 新增测试框架基础结构

backend/app/api/v1/ws.py

@@ -0,0 +1,46 @@
+"""WebSocket 实时推送"""
+import asyncio
+import json
+import logging
+import redis.asyncio as aioredis
+from fastapi import APIRouter, WebSocket, WebSocketDisconnect
+from app.core.config import settings
+
+logger = logging.getLogger(__name__)
+router = APIRouter()
+
+REDIS_CHANNEL = "h3c_onu:status_updates"
+_connected: set[WebSocket] = set()
+
+
+async def _redis_listener():
+    """监听 Redis pub/sub 并广播给所有 WebSocket 客户端"""
+    try:
+        r = aioredis.from_url(settings.REDIS_URL)
+        pubsub = r.pubsub()
+        await pubsub.subscribe(REDIS_CHANNEL)
+        logger.info("WebSocket Redis 监听已启动")
+        async for msg in pubsub.listen():
+            if msg["type"] == "message":
+                dead: set[WebSocket] = set()
+                for ws in _connected:
+                    try:
+                        await ws.send_text(msg["data"].decode())
+                    except Exception:
+                        dead.add(ws)
+                _connected -= dead
+    except Exception as e:
+        logger.error(f"Redis 监听异常: {e}")
+
+
+@router.websocket("/ws/dashboard")
+async def dashboard_ws(ws: WebSocket):
+    await ws.accept()
+    _connected.add(ws)
+    try:
+        while True:
+            await ws.receive_text()  # keep-alive, 忽略客户端消息
+    except WebSocketDisconnect:
+        pass
+    finally:
+        _connected.discard(ws)