feat(channel-monitor): aggregate history to daily rollups + soft delete

明细只保留 1 天，超过 1 天聚合到新表 channel_monitor_daily_rollups（按
monitor_id/model/bucket_date 维度），聚合保留 30 天。两张表都用 SoftDeleteMixin
软删除（DELETE 自动改为 UPDATE deleted_at = NOW()）。

聚合 + 清理任务由 OpsCleanupService 的 cron 统一调度，与运维监控的清理共享
schedule（默认 0 2 * * *）和 leader lock。ChannelMonitorRunner 的 cleanupLoop
被移除，只保留 dueCheckLoop。

读取路径 ComputeAvailability* 改为 UNION 明细（今天 deleted_at IS NULL）+
聚合（过去 windowDays 天 deleted_at IS NULL），SUM(ok)/SUM(total) 自然加权
计算可用率，AVG latency 用 SUM(sum_latency_ms)/SUM(count_latency)。

watermark 表 channel_monitor_aggregation_watermark 单行（id=1），记录
last_aggregated_date，重启后从该日期 +1 继续聚合，首次为 nil 则从
today - 30d 开始回填，单次最多 35 天上限避免长事务。

raw SQL 的 ListLatestPerModel / ListLatestForMonitorIDs / ListRecentHistoryForMonitors
都补上 deleted_at IS NULL 过滤（SoftDeleteMixin interceptor 只对 ent query 生效）。

bump version to 0.1.114.28

GroupBadge 在 MonitorKeyPickerDialog 中复用平台主题色 + 倍率/专属倍率
（顺手优化）。

backend/ent/channelmonitor.go

@@ -54,9 +54,11 @@ type ChannelMonitor struct {
 type ChannelMonitorEdges struct {
 	// History holds the value of the history edge.
 	History []*ChannelMonitorHistory `json:"history,omitempty"`
+	// DailyRollups holds the value of the daily_rollups edge.
+	DailyRollups []*ChannelMonitorDailyRollup `json:"daily_rollups,omitempty"`
 	// loadedTypes holds the information for reporting if a
 	// type was loaded (or requested) in eager-loading or not.
-	loadedTypes [1]bool
+	loadedTypes [2]bool
 }
 
 // HistoryOrErr returns the History value or an error if the edge
@@ -68,6 +70,15 @@ func (e ChannelMonitorEdges) HistoryOrErr() ([]*ChannelMonitorHistory, error) {
 	return nil, &NotLoadedError{edge: "history"}
 }
 
+// DailyRollupsOrErr returns the DailyRollups value or an error if the edge
+// was not loaded in eager-loading.
+func (e ChannelMonitorEdges) DailyRollupsOrErr() ([]*ChannelMonitorDailyRollup, error) {
+	if e.loadedTypes[1] {
+		return e.DailyRollups, nil
+	}
+	return nil, &NotLoadedError{edge: "daily_rollups"}
+}
+
 // scanValues returns the types for scanning values from sql.Rows.
 func (*ChannelMonitor) scanValues(columns []string) ([]any, error) {
 	values := make([]any, len(columns))
@@ -203,6 +214,11 @@ func (_m *ChannelMonitor) QueryHistory() *ChannelMonitorHistoryQuery {
 	return NewChannelMonitorClient(_m.config).QueryHistory(_m)
 }
 
+// QueryDailyRollups queries the "daily_rollups" edge of the ChannelMonitor entity.
+func (_m *ChannelMonitor) QueryDailyRollups() *ChannelMonitorDailyRollupQuery {
+	return NewChannelMonitorClient(_m.config).QueryDailyRollups(_m)
+}
+
 // Update returns a builder for updating this ChannelMonitor.
 // Note that you need to call ChannelMonitor.Unwrap() before calling this method if this ChannelMonitor
 // was returned from a transaction, and the transaction was committed or rolled back.