diff --git a/apps/api/src/api/v1/webhooks.py b/apps/api/src/api/v1/webhooks.py
index e4948df8..556492ce 100644
--- a/apps/api/src/api/v1/webhooks.py
+++ b/apps/api/src/api/v1/webhooks.py
@@ -462,8 +462,8 @@ async def verify_webhook_signature(
 
 # generate_alert_fingerprint 已封裝為 AlertAnalyzer.generate_fingerprint (首席架構師 v1.2 2026-04-01 Asia/Taipei)
 
-# 戰略 B: 滑動時間窗 (5 分鐘)
-DEBOUNCE_WINDOW_MINUTES = 5
+# 戰略 B: 滑動時間窗 (ADR-073: 5 分鐘改 30 分鐘，防同一問題反覆重建 Incident，2026-04-12 ogt)
+DEBOUNCE_WINDOW_MINUTES = 30
 
 
 # =============================================================================
diff --git a/apps/api/src/repositories/incident_repository.py b/apps/api/src/repositories/incident_repository.py
index 85620339..6ff69bb5 100644
--- a/apps/api/src/repositories/incident_repository.py
+++ b/apps/api/src/repositories/incident_repository.py
@@ -65,7 +65,13 @@ def _incident_to_record_data(incident: Incident) -> dict[str, Any]:
         "incident_id": incident.incident_id,
         "status": incident.status.value,
         "severity": incident.severity.value,
-        "signals": [s.model_dump() for s in incident.signals],
+        "signals": [
+            {
+                **s.model_dump(),
+                "alertname": s.alert_name,  # ADR-073: DB query 用 signals->0->>'alertname'，補充 alias
+            }
+            for s in incident.signals
+        ],
         "affected_services": incident.affected_services,
         "proposal_ids": incident.proposal_ids,
         "created_at": incident.created_at,
diff --git a/k8s/awoooi-prod/kustomization.yaml b/k8s/awoooi-prod/kustomization.yaml
index 2b8adc39..e135dd02 100644
--- a/k8s/awoooi-prod/kustomization.yaml
+++ b/k8s/awoooi-prod/kustomization.yaml
@@ -38,7 +38,7 @@ resources:
 images:
 - name: 192.168.0.110:5000/library/api:IMAGE_TAG_PLACEHOLDER
   newName: 192.168.0.110:5000/awoooi/api
-  newTag: a86ecf32a2e7be70b2d130fbadd9e9ad655ea5e1
+  newTag: 8be87b0f32a7430d86e93b9be63677c0e498bb79
 - name: 192.168.0.110:5000/library/web:IMAGE_TAG_PLACEHOLDER
   newName: 192.168.0.110:5000/awoooi/web
-  newTag: a86ecf32a2e7be70b2d130fbadd9e9ad655ea5e1
+  newTag: 8be87b0f32a7430d86e93b9be63677c0e498bb79