test: establish monitoring configuration contract

backend/.env.example

@@ -1,20 +1,33 @@
+# 运行环境
+ENVIRONMENT=development
+
 # 数据库（开发用 SQLite，生产用 PostgreSQL）
 DATABASE_URL=sqlite+aiosqlite:///./pingwatch.db
-# DATABASE_URL=postgresql+asyncpg://user:pass@localhost/pingwatch
 
 # 企业微信
-WECOM_CORP_ID=your_corp_id
-WECOM_AGENT_ID=1000001
-WECOM_APP_SECRET=your_app_secret
+WECOM_NOTIFICATION_ENABLED=false
+WECOM_CORP_ID=
+WECOM_AGENT_ID=0
+WECOM_APP_SECRET=
+WECOM_TO_PARTY=
+WECOM_NOTIFICATION_MAX_ATTEMPTS=5
+WECOM_RETRY_BASE_SECONDS=30
 
 # Casdoor
 CASDOOR_ENDPOINT=https://casdoor.dhdx.fun
-CASDOOR_CLIENT_ID=e46b9e1eb893027bdf2a
-CASDOOR_CLIENT_SECRET=b12c7e1688ed51481f3b5c5dae4191b6edbba916
+CASDOOR_CLIENT_ID=
+CASDOOR_CLIENT_SECRET=
 CASDOOR_CERTIFICATE=
 CASDOOR_ORGANIZATION=dahua
 CASDOOR_APPLICATION=PingWatch
-CASDOOR_REDIRECT_URI=http://10.10.10.7:5173/login
+CASDOOR_REDIRECT_URI=
+
+# 连通性监测
+PROBE_PACKETS_PER_ROUND=3
+OFFLINE_CONSECUTIVE_ROUNDS=2
+DEGRADED_WINDOW_ROUNDS=5
+DEGRADED_LOSS_PERCENT=20.0
+RECOVERY_CONSECUTIVE_CLEAN_ROUNDS=3
 
 # Ping 引擎
 PING_INTERVAL_SECONDS=30
@@ -31,5 +44,8 @@ OFFLINE_SUPPRESS_RATIO=0.9
 PING_RECORD_RETENTION_DAYS=90
 ALERT_RETENTION_DAYS=365
 
-# JWT 密钥（请改成随机字符串）
-SECRET_KEY=change-me-to-a-long-random-string
+# JWT 密钥（生产环境必须由受控运行环境注入）
+SECRET_KEY=
+
+# LogHive（可选）
+LOGHIVE_API_KEY=