fix(aiops-p1): Playbook 學習閉環 5斷點全修 + DB Migration（ADR-092 B4）

【P0.4 補丁】pre_decision_investigator Prometheus query 欄位缺失
- _build_tool_params() 補 "query" 欄位（prometheus_query tool 必要參數）
- 新增 _build_prometheus_query() — 依告警類型生成 PromQL（CPU/Memory/Crash/Disk/HTTP/Pod/fallback）
- 修復後 D3_METRICS 感官維度實際取得資料（原本 100% 回 missing_query_parameter）

【P1 Playbook 學習閉環 B1-B5 全修】
- B2 db/models.py: ApprovalRecord 新增 matched_playbook_id 欄位 + ix_approval_matched_playbook index
- B2 db/models.py: TimelineEvent 新增 incident_id 欄位（MCP 稽核用）+ index
- B3 approval_db.py: record→ApprovalRequest 補回 incident_id + matched_playbook_id
- B4 approval_repository.py: 同 B3（兩個轉換函式必須同步）
- B5 approval_db.py: approval_request_to_record_data 補 matched_playbook_id → DB 才能存值

【P1.5 KM 寫入】approval_execution.py: fire-and-forget → await wait_for(30s)
- 根因：asyncio.create_task 在 Pod recycle 時被殺，KM 寫入靜默遺失
- 修復：await asyncio.wait_for(..., timeout=30.0) + TimeoutError log

【Migration 文件】adr092_p1_learning_chain_fix.sql
- ALTER TABLE approval_records ADD COLUMN matched_playbook_id VARCHAR(36)
- ALTER TABLE timeline_events ADD COLUMN incident_id VARCHAR(64)
- 執行：psql $DATABASE_URL -f apps/api/migrations/adr092_p1_learning_chain_fix.sql

【附帶 Agent 改動】
- decision_manager: Phase 2 YAML NO_ACTION 優先門（主機層/外部服務跳過 Agent Debate）
- alert_rules.yaml: Sentry/ClickHouse + HostDiskUsageHigh/Critical 新規則
- solver_agent: action_title 語意合成兜底（取代靜默丟棄）

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

apps/api/src/services/decision_manager.py

@@ -1140,6 +1140,7 @@ def _package_to_proposal_data(package: Any) -> dict[str, Any]:
         "confidence": confidence,
         "risk_level": risk_level,
         "source": "phase2_agent_debate",
+        "provider": "phase2_agents",  # 2026-04-24 ogt: 讓 Telegram 顯示 "Phase2 Agents" 而非通用 "AI 仲裁"
         "requires_human_review": package.requires_human_approval,
         # Phase 2 診斷摘要（供 Audit Trail / 學習閉環，不直接顯示給用戶）
         "debate_summary": package.debate_summary or "",
@@ -2283,6 +2284,45 @@ class DecisionManager:
         # 需要 EvidenceSnapshot；若 P1 未開啟則自行收集
         # 2026-04-15 ogt + Claude Sonnet 4.6（亞太）
         if aiops_flags.is_phase_enabled(2):  # Gate 2: 用 is_phase_enabled 統一父 Phase 守衛
+            # 2026-04-24 ogt + Claude Sonnet 4.6: YAML NO_ACTION 優先門
+            # 根因：Phase 2 五 agent 對主機層/外部服務告警（HostDiskUsageHigh /
+            #       SentryClickHouseMemoryPressure）做 kubectl 分析 → Solver 永遠降級
+            #       (無 K8s target) → confidence=20% + kubectl get pods（無意義）
+            # 修復：YAML 匹配到 NO_ACTION 且 kubectl_command="" → 跳過 Agent Debate，
+            #       直接返回 YAML 規則響應，讓 Telegram 推送人工排查通知
+            try:
+                from src.services.alert_rule_engine import match_rule as _p2_match_rule
+                _p2_labels = incident.signals[0].labels if incident.signals else {}
+                _p2_alertname = _p2_labels.get("alertname", "")
+                _p2_yaml = _p2_match_rule({
+                    "labels": _p2_labels,
+                    "alert_type": _p2_alertname,
+                    "message": (
+                        incident.signals[0].annotations.get("summary", "")
+                        if incident.signals else ""
+                    ),
+                    "target_resource": incident.affected_services[0] if incident.affected_services else "unknown",
+                    "namespace": _p2_labels.get("namespace", "awoooi-prod"),
+                    "severity": incident.severity.value if hasattr(incident.severity, "value") else "medium",
+                })
+                _is_no_action_yaml = (
+                    _p2_yaml is not None
+                    and _p2_yaml.get("suggested_action") == "NO_ACTION"
+                    and not _p2_yaml.get("kubectl_command", "").strip()
+                    and _p2_yaml.get("rule_id", "") not in ("generic_fallback", "")
+                )
+                if _is_no_action_yaml:
+                    logger.info(
+                        "p2_yaml_no_action_bypass",
+                        incident_id=incident.incident_id,
+                        alertname=_p2_alertname,
+                        rule_id=_p2_yaml.get("rule_id", ""),
+                        reason="YAML NO_ACTION 規則命中，跳過 Agent Debate",
+                    )
+                    return _p2_yaml
+            except Exception as _p2_yaml_err:
+                logger.debug("p2_yaml_precheck_error", error=str(_p2_yaml_err))
+
             p2_snapshot = evidence_snapshot
             if p2_snapshot is None:
                 try: