feat(telegram): implement reanalyze button handler, replace placeholder (ADR-050)

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

apps/api/src/services/telegram_gateway.py

@@ -1821,9 +1821,13 @@ class TelegramGateway:
                     # 2026-04-01 Claude Code (ADR-050 P2)
                     await self._answer_callback(callback_query_id, action, text="📊 歷史統計傳送中...")
                     await self._send_incident_history(incident_id)
+                elif action == "reanalyze":
+                    # ADR-050 P2: 觸發重診
+                    # 2026-04-01 Claude Code (ADR-050 P2): reanalyze button handler
+                    await self._answer_callback(callback_query_id, action, text="🔄 重診排程中...")
+                    await self._send_reanalyze_result(incident_id)
                 else:
-                    # reanalyze: 開發中
-                    await self._answer_callback(callback_query_id, action, text="🔄 功能開發中")
+                    await self._answer_callback(callback_query_id, action, text="⚠️ 未知操作")
 
                 return {
                     "action": action,
@@ -2345,6 +2349,49 @@ class TelegramGateway:
             logger.warning("send_incident_history_failed", incident_id=incident_id, error=str(e))
             await self.send_notification(f"⚠️ 無法取得歷史統計: {html.escape(str(e)[:100])}")
 
+    async def _send_reanalyze_result(self, incident_id: str) -> None:
+        """
+        ADR-050 P2: 觸發重診並傳送結果訊息
+
+        呼叫 IncidentService.trigger_reanalysis()，以新訊息回報排程結果。
+        不修改原始簽核卡片，避免干擾授權流程。
+
+        2026-04-01 Claude Code (ADR-050 P2): reanalyze button handler
+        """
+        from src.services.incident_service import get_incident_service
+
+        try:
+            service = get_incident_service()
+            result = await service.trigger_reanalysis(incident_id)
+
+            if result["already_analyzing"]:
+                msg = (
+                    f"⏳ <b>重診進行中</b>\n\n"
+                    f"🔖 <code>{html.escape(incident_id)}</code>\n\n"
+                    f"{html.escape(result['message'])}"
+                )
+            elif result["triggered"]:
+                msg = (
+                    f"🔄 <b>重診已排程</b>\n\n"
+                    f"🔖 <code>{html.escape(incident_id)}</code>\n\n"
+                    f"✅ {html.escape(result['message'])}\n"
+                    f"AI 分析結果將自動更新事件狀態。"
+                )
+            else:
+                msg = (
+                    f"⚠️ <b>重診失敗</b>\n\n"
+                    f"🔖 <code>{html.escape(incident_id)}</code>\n\n"
+                    f"{html.escape(result['message'])}"
+                )
+
+            await self.send_notification(msg)
+
+        except Exception as e:
+            logger.warning("send_reanalyze_result_failed", incident_id=incident_id, error=str(e))
+            await self.send_notification(
+                f"⚠️ 重診觸發失敗: {html.escape(str(e)[:100])}"
+            )
+
     async def send_notification(
         self,
         text: str,