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/intercept/intercept.go

@@ -16,6 +16,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/authidentity"
 	"github.com/Wei-Shaw/sub2api/ent/authidentitychannel"
 	"github.com/Wei-Shaw/sub2api/ent/channelmonitor"
+	"github.com/Wei-Shaw/sub2api/ent/channelmonitordailyrollup"
 	"github.com/Wei-Shaw/sub2api/ent/channelmonitorhistory"
 	"github.com/Wei-Shaw/sub2api/ent/errorpassthroughrule"
 	"github.com/Wei-Shaw/sub2api/ent/group"
@@ -315,6 +316,33 @@ func (f TraverseChannelMonitor) Traverse(ctx context.Context, q ent.Query) error
 	return fmt.Errorf("unexpected query type %T. expect *ent.ChannelMonitorQuery", q)
 }
 
+// The ChannelMonitorDailyRollupFunc type is an adapter to allow the use of ordinary function as a Querier.
+type ChannelMonitorDailyRollupFunc func(context.Context, *ent.ChannelMonitorDailyRollupQuery) (ent.Value, error)
+
+// Query calls f(ctx, q).
+func (f ChannelMonitorDailyRollupFunc) Query(ctx context.Context, q ent.Query) (ent.Value, error) {
+	if q, ok := q.(*ent.ChannelMonitorDailyRollupQuery); ok {
+		return f(ctx, q)
+	}
+	return nil, fmt.Errorf("unexpected query type %T. expect *ent.ChannelMonitorDailyRollupQuery", q)
+}
+
+// The TraverseChannelMonitorDailyRollup type is an adapter to allow the use of ordinary function as Traverser.
+type TraverseChannelMonitorDailyRollup func(context.Context, *ent.ChannelMonitorDailyRollupQuery) error
+
+// Intercept is a dummy implementation of Intercept that returns the next Querier in the pipeline.
+func (f TraverseChannelMonitorDailyRollup) Intercept(next ent.Querier) ent.Querier {
+	return next
+}
+
+// Traverse calls f(ctx, q).
+func (f TraverseChannelMonitorDailyRollup) Traverse(ctx context.Context, q ent.Query) error {
+	if q, ok := q.(*ent.ChannelMonitorDailyRollupQuery); ok {
+		return f(ctx, q)
+	}
+	return fmt.Errorf("unexpected query type %T. expect *ent.ChannelMonitorDailyRollupQuery", q)
+}
+
 // The ChannelMonitorHistoryFunc type is an adapter to allow the use of ordinary function as a Querier.
 type ChannelMonitorHistoryFunc func(context.Context, *ent.ChannelMonitorHistoryQuery) (ent.Value, error)
 
@@ -982,6 +1010,8 @@ func NewQuery(q ent.Query) (Query, error) {
 		return &query[*ent.AuthIdentityChannelQuery, predicate.AuthIdentityChannel, authidentitychannel.OrderOption]{typ: ent.TypeAuthIdentityChannel, tq: q}, nil
 	case *ent.ChannelMonitorQuery:
 		return &query[*ent.ChannelMonitorQuery, predicate.ChannelMonitor, channelmonitor.OrderOption]{typ: ent.TypeChannelMonitor, tq: q}, nil
+	case *ent.ChannelMonitorDailyRollupQuery:
+		return &query[*ent.ChannelMonitorDailyRollupQuery, predicate.ChannelMonitorDailyRollup, channelmonitordailyrollup.OrderOption]{typ: ent.TypeChannelMonitorDailyRollup, tq: q}, nil
 	case *ent.ChannelMonitorHistoryQuery:
 		return &query[*ent.ChannelMonitorHistoryQuery, predicate.ChannelMonitorHistory, channelmonitorhistory.OrderOption]{typ: ent.TypeChannelMonitorHistory, tq: q}, nil
 	case *ent.ErrorPassthroughRuleQuery: