feat(mcp-phase4b): 自動修復後抓 K8s Pod 狀態寫入 k8s_state_after

_push_auto_repair_result() 成功後:
  - 呼叫 K8sProvider.kubectl_get(pods, label=app=<service>)
  - 結果截斷 500 字寫入 incidents.k8s_state_after
  - km_conversion_service._build_content() 已支援顯示此欄位
  - 失敗靜默 debug log，不阻塞主流程

完成 KM 三段資料閉環: 症狀(labels) + 情境(metrics_before) + 動作(action) + 效果(metrics_after + k8s_state_after)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/services/decision_manager.py

@@ -459,6 +459,33 @@ async def _push_auto_repair_result(
 
             metrics_delta_text = _format_metrics_delta(metrics_before, metrics_after)
 
+            # MCP Phase 4b: 抓 K8s Pod 狀態寫入 k8s_state_after (2026-04-11 Claude Sonnet 4.6)
+            try:
+                from src.plugins.mcp.providers.k8s_provider import K8sProvider
+                _k8s = K8sProvider()
+                if _k8s.enabled:
+                    _service = (incident.affected_services or [""])[0]
+                    if _service:
+                        _k8s_result = await _k8s.execute(
+                            "kubectl_get",
+                            {"resource_type": "pods", "namespace": "awoooi-prod",
+                             "label_selector": f"app={_service}"},
+                        )
+                        if _k8s_result.success and _k8s_result.data:
+                            _k8s_state = str(_k8s_result.data)[:500]
+                            from src.db.base import get_db_context
+                            from src.db.models import Incident as IncidentORM
+                            from sqlalchemy import update as _upd2
+                            async with get_db_context() as _db2:
+                                await _db2.execute(
+                                    _upd2(IncidentORM)
+                                    .where(IncidentORM.incident_id == inc_id)
+                                    .values(k8s_state_after=_k8s_state)
+                                )
+                                await _db2.commit()
+            except Exception as _k8s_err:
+                logger.debug("k8s_state_after_failed", incident_id=inc_id, error=str(_k8s_err))
+
         if success:
             delta_line = f"\n├ 指標: <code>{metrics_delta_text}</code>" if metrics_delta_text else ""
             status_line = (