feat(backthink): 事件驱动主动消息绕过PushGate——IoT等事件该发就发(heartbeat仍受60min节流)

- trigger.go: 新增 TriggerKind(TriggerHeartbeat/TriggerEvent) + Trigger.Kind 标记触发来源
- push.go: PushRequest.TriggerKind 分流——event 跳过 gate.Allow/RecordPush(该发就发)，heartbeat 仍受 60min≤1/冷却/分类限频；PushResult.Bypassed 标记 + detail=event_bypass 区分
- backthink.go: think() 传 TriggerKind + 过同事件去重门
- event_dedup.go(新): 同事件(Source+Summary)去重防刷，无 60min 节流；不同事件/心跳后重置链
- 测试: event 连续 3 次全推 bypass / heartbeat 第2次 rate_limited / event 不消耗心跳限 / 同事件去重
- build/vet/test 全绿 + windows/darwin 交叉编译通过

internal/services/backthink/trigger.go

@@ -7,6 +7,33 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/iot"
 )
 
+// TriggerKind classifies what woke a thinking pass, so the push path can apply the
+// right policy: a heartbeat is gate-governed (60min≤1 / cooldown / per-flavor), an
+// event is a real signal the owner wants to hear about and bypasses the rate gate.
+type TriggerKind int
+
+const (
+	// TriggerHeartbeat is the periodic autonomous reflection. Its proactive push is
+	// throttled by the PushGate so the owner is never spammed by empty reflections.
+	TriggerHeartbeat TriggerKind = iota
+	// TriggerEvent is a real event (IoT device change, reminder, owner-relevant
+	// system event). Its push bypasses the PushGate — "该发就发" — subject only to
+	// same-event dedup.
+	TriggerEvent
+)
+
+// String returns a stable label for logs and records.
+func (k TriggerKind) String() string {
+	switch k {
+	case TriggerEvent:
+		return "event"
+	case TriggerHeartbeat:
+		return "heartbeat"
+	default:
+		return fmt.Sprintf("triggerkind(%d)", int(k))
+	}
+}
+
 // Bus subjects the service subscribes to for event-triggered thinking. They are
 // the contract defined by design/12 §1: an IoT state change, a reminder firing,
 // or a generic system event.
@@ -34,17 +61,21 @@ type Trigger struct {
 	Source  string
 	Summary string
 	Import  Importance
+	// Kind records whether this pass was the periodic heartbeat or a real event, so
+	// the push path can bypass the rate gate for a genuine event (owner mandate).
+	Kind TriggerKind
 }
 
 // heartbeatTrigger is the periodic, low-importance trigger. Low importance means
 // the pass rarely interrupts the user, honouring "默认不发送 chat 类型消息".
 func heartbeatTrigger() Trigger {
-	return Trigger{Source: "heartbeat", Summary: "periodic autonomous reflection", Import: ImportanceLow}
+	return Trigger{Source: "heartbeat", Summary: "periodic autonomous reflection", Import: ImportanceLow, Kind: TriggerHeartbeat}
 }
 
 // triggerForEvent maps a bus event to a Trigger. An IoT device change is treated
 // as normal importance, a reminder firing as high importance, and a generic
-// system event as normal importance.
+// system event as normal importance. Every event is tagged TriggerEvent so its
+// proactive push bypasses the heartbeat PushGate.
 func triggerForEvent(e bus.Event) Trigger {
 	switch e.Subject {
 	case iot.DeviceUpdateSubject:
@@ -53,13 +84,14 @@ func triggerForEvent(e bus.Event) Trigger {
 				Source:  e.Subject,
 				Summary: fmt.Sprintf("device %s (%s) %s", d.Device.ID, d.Device.Type, d.Action),
 				Import:  ImportanceNormal,
+				Kind:    TriggerEvent,
 			}
 		}
-		return Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceNormal}
+		return Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceNormal, Kind: TriggerEvent}
 	case SubjectReminderTrigger:
-		return Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceHigh}
+		return Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceHigh, Kind: TriggerEvent}
 	case SubjectSystemEvent:
-		tr := Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceNormal}
+		tr := Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceNormal, Kind: TriggerEvent}
 		if sy, ok := e.Payload.(SystemEvent); ok {
 			if sy.Summary != "" {
 				tr.Summary = sy.Summary
@@ -68,6 +100,6 @@ func triggerForEvent(e bus.Event) Trigger {
 		}
 		return tr
 	default:
-		return Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceNormal}
+		return Trigger{Source: e.Subject, Summary: e.Subject, Import: ImportanceNormal, Kind: TriggerEvent}
 	}
 }