fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

backend/ops_manager.py

@@ -29,7 +29,6 @@ import httpx
 # Database path
 DB_PATH = os.path.join(os.path.dirname(__file__), "insightflow.db")
 
-
 class AlertSeverity(StrEnum):
     """告警严重级别 P0-P3"""
 
@@ -38,7 +37,6 @@ class AlertSeverity(StrEnum):
     P2 = "p2"  # 一般 - 部分功能受影响，需要4小时内处理
     P3 = "p3"  # 轻微 - 非核心功能问题，24小时内处理
 
-
 class AlertStatus(StrEnum):
     """告警状态"""
 
@@ -47,7 +45,6 @@ class AlertStatus(StrEnum):
     ACKNOWLEDGED = "acknowledged"  # 已确认
     SUPPRESSED = "suppressed"  # 已抑制
 
-
 class AlertChannelType(StrEnum):
     """告警渠道类型"""
 
@@ -60,7 +57,6 @@ class AlertChannelType(StrEnum):
     SMS = "sms"
     WEBHOOK = "webhook"
 
-
 class AlertRuleType(StrEnum):
     """告警规则类型"""
 
@@ -69,7 +65,6 @@ class AlertRuleType(StrEnum):
     PREDICTIVE = "predictive"  # 预测性告警
     COMPOSITE = "composite"  # 复合告警
 
-
 class ResourceType(StrEnum):
     """资源类型"""
 
@@ -82,7 +77,6 @@ class ResourceType(StrEnum):
     CACHE = "cache"
     QUEUE = "queue"
 
-
 class ScalingAction(StrEnum):
     """扩缩容动作"""
 
@@ -90,7 +84,6 @@ class ScalingAction(StrEnum):
     SCALE_DOWN = "scale_down"  # 缩容
     MAINTAIN = "maintain"  # 保持
 
-
 class HealthStatus(StrEnum):
     """健康状态"""
 
@@ -99,7 +92,6 @@ class HealthStatus(StrEnum):
     UNHEALTHY = "unhealthy"
     UNKNOWN = "unknown"
 
-
 class BackupStatus(StrEnum):
     """备份状态"""
 
@@ -109,7 +101,6 @@ class BackupStatus(StrEnum):
     FAILED = "failed"
     VERIFIED = "verified"
 
-
 @dataclass
 class AlertRule:
     """告警规则"""
@@ -133,7 +124,6 @@ class AlertRule:
     updated_at: str
     created_by: str
 
-
 @dataclass
 class AlertChannel:
     """告警渠道配置"""
@@ -151,7 +141,6 @@ class AlertChannel:
     created_at: str
     updated_at: str
 
-
 @dataclass
 class Alert:
     """告警实例"""
@@ -175,7 +164,6 @@ class Alert:
     notification_sent: dict[str, bool]  # 渠道发送状态
     suppression_count: int  # 抑制计数
 
-
 @dataclass
 class AlertSuppressionRule:
     """告警抑制规则"""
@@ -189,7 +177,6 @@ class AlertSuppressionRule:
     created_at: str
     expires_at: str | None
 
-
 @dataclass
 class AlertGroup:
     """告警聚合组"""
@@ -201,7 +188,6 @@ class AlertGroup:
     created_at: str
     updated_at: str
 
-
 @dataclass
 class ResourceMetric:
     """资源指标"""
@@ -216,7 +202,6 @@ class ResourceMetric:
     timestamp: str
     metadata: dict
 
-
 @dataclass
 class CapacityPlan:
     """容量规划"""
@@ -232,7 +217,6 @@ class CapacityPlan:
     estimated_cost: float
     created_at: str
 
-
 @dataclass
 class AutoScalingPolicy:
     """自动扩缩容策略"""
@@ -253,7 +237,6 @@ class AutoScalingPolicy:
     created_at: str
     updated_at: str
 
-
 @dataclass
 class ScalingEvent:
     """扩缩容事件"""
@@ -271,7 +254,6 @@ class ScalingEvent:
     completed_at: str | None
     error_message: str | None
 
-
 @dataclass
 class HealthCheck:
     """健康检查配置"""
@@ -292,7 +274,6 @@ class HealthCheck:
     created_at: str
     updated_at: str
 
-
 @dataclass
 class HealthCheckResult:
     """健康检查结果"""
@@ -306,7 +287,6 @@ class HealthCheckResult:
     details: dict
     checked_at: str
 
-
 @dataclass
 class FailoverConfig:
     """故障转移配置"""
@@ -324,7 +304,6 @@ class FailoverConfig:
     created_at: str
     updated_at: str
 
-
 @dataclass
 class FailoverEvent:
     """故障转移事件"""
@@ -340,7 +319,6 @@ class FailoverEvent:
     completed_at: str | None
     rolled_back_at: str | None
 
-
 @dataclass
 class BackupJob:
     """备份任务"""
@@ -360,7 +338,6 @@ class BackupJob:
     created_at: str
     updated_at: str
 
-
 @dataclass
 class BackupRecord:
     """备份记录"""
@@ -377,7 +354,6 @@ class BackupRecord:
     error_message: str | None
     storage_path: str
 
-
 @dataclass
 class CostReport:
     """成本报告"""
@@ -392,7 +368,6 @@ class CostReport:
     anomalies: list[dict]  # 异常检测
     created_at: str
 
-
 @dataclass
 class ResourceUtilization:
     """资源利用率"""
@@ -408,7 +383,6 @@ class ResourceUtilization:
     report_date: str
     recommendations: list[str]
 
-
 @dataclass
 class IdleResource:
     """闲置资源"""
@@ -425,7 +399,6 @@ class IdleResource:
     recommendation: str
     detected_at: str
 
-
 @dataclass
 class CostOptimizationSuggestion:
     """成本优化建议"""
@@ -445,7 +418,6 @@ class CostOptimizationSuggestion:
     created_at: str
     applied_at: str | None
 
-
 class OpsManager:
     """运维与监控管理主类"""
 
@@ -3098,11 +3070,9 @@ class OpsManager:
             applied_at=row["applied_at"],
         )
 
-
 # Singleton instance
 _ops_manager = None
 
-
 def get_ops_manager() -> OpsManager:
     global _ops_manager
     if _ops_manager is None: