chore: import upstream snapshot with attribution

shortcuts/event/processor_generic.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package event
+
+import (
+	"context"
+	"encoding/json"
+)
+
+// GenericProcessor is the fallback for unregistered event types.
+// Compact mode parses the event payload as a map; Raw mode passes through raw.Event.
+type GenericProcessor struct{}
+
+func (p *GenericProcessor) EventType() string { return "" }
+
+func (p *GenericProcessor) Transform(_ context.Context, raw *RawEvent, mode TransformMode) interface{} {
+	if mode == TransformRaw {
+		return raw
+	}
+	// Compact: parse event as flat map, inject envelope metadata so AI
+	// can always identify the event type regardless of which processor ran.
+	var eventMap map[string]interface{}
+	if err := json.Unmarshal(raw.Event, &eventMap); err != nil {
+		return raw
+	}
+	eventMap["type"] = raw.Header.EventType
+	if raw.Header.EventID != "" {
+		eventMap["event_id"] = raw.Header.EventID
+	}
+	if raw.Header.CreateTime != "" {
+		eventMap["timestamp"] = raw.Header.CreateTime
+	}
+	return eventMap
+}
+
+func (p *GenericProcessor) DeduplicateKey(raw *RawEvent) string { return raw.Header.EventID }
+func (p *GenericProcessor) WindowStrategy() WindowConfig        { return WindowConfig{} }