feat(openclaw): 週報 KM 引用標注（citation footer）

- _build_citation_footer(): 查詢當週 ai_insights 引用來源
  依日期+類型彙整，附結構化「📚 本報告引用來源」區塊
- generate_weekly_strategy_report():
  prompt 加入行內引用指令（引用自 YYYY-MM-DD ～ YYYY-MM-DD 的洞察）
  Gemini 回傳後自動追加 citation footer，連同週報雙寫入 ai_insights

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

services/openclaw_strategist_service.py

@@ -7,6 +7,54 @@ from database.manager import get_session
 from sqlalchemy import text
 from services.openclaw_learning_service import build_rag_context_by_date, store_insight
 
+
+def _build_citation_footer(start_date: str, end_date: str) -> str:
+    """
+    查詢 ai_insights 中 [start_date, end_date] 區間的洞察來源，
+    回傳結構化引用區塊供週報末尾附加。
+    """
+    session = get_session()
+    try:
+        rows = session.execute(text("""
+            SELECT
+                DATE(created_at)::text AS day,
+                insight_type,
+                COUNT(*) AS cnt
+              FROM ai_insights
+             WHERE DATE(created_at) BETWEEN :s AND :e
+               AND status NOT IN ('archived')
+             GROUP BY DATE(created_at), insight_type
+             ORDER BY DATE(created_at), insight_type
+        """), {"s": start_date, "e": end_date}).fetchall()
+
+        if not rows:
+            return ""
+
+        TYPE_LABEL = {
+            "price_alert":        "競價告警",
+            "human_review":       "人工覆核",
+            "recommendation":     "推薦商品",
+            "km_price_competition":  "KM競價情報",
+            "km_sales_anomaly":      "KM銷量異常",
+            "km_promotion_opportunity": "KM促銷機會",
+            "km_market_trend":       "KM市場趨勢",
+            "relearn_event":      "重新學習事件",
+            "backup_status":      "備份狀態",
+        }
+
+        lines = ["\n\n---", "📚 **本報告引用來源：**"]
+        for day, itype, cnt in rows:
+            label = TYPE_LABEL.get(itype, itype)
+            lines.append(f"• {day} 的「{label}」洞察（{cnt} 筆）")
+        lines.append(f"\n> 資料區間：{start_date} ～ {end_date}，"
+                     f"由 Hermes / NemoTron / OpenClaw 三層 AI 系統自動蒐集")
+        return "\n".join(lines)
+    except Exception as e:
+        sys_log.warning(f"[OCStrategist] citation footer 查詢失敗: {e}")
+        return ""
+    finally:
+        session.close()
+
 sys_log = SystemLogger("OCStrategist").get_logger()
 
 try:
@@ -128,11 +176,17 @@ def generate_weekly_strategy_report(force_tg_alert: bool = False) -> str:
 (根據上述現象，具體給出下週該執行的行銷加碼、特價活動或降價策略)
 
 請用繁體中文，語氣保持專業、精煉、具備行動力。
+在報告的每個具體數據或告警描述後，若來自「資料二」，請在句末標注【引用自 {start_date_str} ～ {end_date_str} 的洞察】。
 """
 
     # 3. 呼叫 Gemini
     report_md = _call_gemini_flash(prompt)
-    
+
+    # 附加 KM 引用來源區塊（無論 Gemini 是否成功，皆嘗試附加）
+    citation_footer = _build_citation_footer(start_date_str, end_date_str)
+    if citation_footer:
+        report_md = report_md + citation_footer
+
     # 4. Dual-Write 存入 ai_insights 知識庫
     if not report_md.startswith("⚠️ 呼叫 Gemini 失敗"):
         insight_id = store_insight(