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/db/models.py

@@ -167,6 +167,15 @@ class ApprovalRecord(Base):
         comment="Telegram chat_id where the approval card was sent",
     )
 
+    # B2 fix 2026-04-24 ogt + Claude Sonnet 4.6: Playbook 學習閉環斷鏈修復
+    # 原欄位缺失 → 人工審核後 matched_playbook_id 永遠 NULL → EWMA 無法更新
+    matched_playbook_id: Mapped[str | None] = mapped_column(
+        String(36),
+        nullable=True,
+        index=True,
+        comment="匹配的 Playbook ID，學習服務用以更新 EWMA trust score",
+    )
+
     # Timestamps
     created_at: Mapped[datetime] = mapped_column(
         DateTime(timezone=True),
@@ -193,6 +202,7 @@ class ApprovalRecord(Base):
         Index("ix_approval_created_at", "created_at"),
         Index("ix_approval_requested_by", "requested_by"),
         Index("ix_approval_fingerprint", "fingerprint"),  # 戰略 B: 指紋查詢優化
+        Index("ix_approval_matched_playbook", "matched_playbook_id"),  # B2 fix
     )
 
 
@@ -244,6 +254,14 @@ class TimelineEvent(Base):
     # Context
     risk_level: Mapped[str | None] = mapped_column(String(20), nullable=True)
     approval_id: Mapped[str | None] = mapped_column(String(36), nullable=True, index=True)
+    # P1.6 fix 2026-04-24 ogt + Claude Sonnet 4.6: pre_decision_investigator raw SQL 寫不存在欄位
+    # 原本 INSERT INTO timeline_events (incident_id, ...) 失敗 → 每天+1 錯誤靜默吞
+    incident_id: Mapped[str | None] = mapped_column(
+        String(64),
+        nullable=True,
+        index=True,
+        comment="關聯的 Incident ID（MCP 事件稽核用）",
+    )
 
     # Timestamp
     created_at: Mapped[datetime] = mapped_column(
@@ -255,6 +273,7 @@ class TimelineEvent(Base):
     __table_args__ = (
         Index("ix_timeline_event_type", "event_type"),
         Index("ix_timeline_created_at", "created_at"),
+        Index("ix_timeline_incident_id", "incident_id"),  # P1.6 fix
     )