fix(api): 標示全零週報資料鏈異常

apps/api/src/services/telegram_gateway.py

@@ -3168,6 +3168,11 @@ class WeeklyReportMessage:
     disposition_manual: int = 0
     disposition_cold_start: int = 0
     disposition_total: int = 0
+    stats_source_ok: bool = True
+    k3s_source_ok: bool = True
+    git_source_ok: bool = True
+    cost_source_ok: bool = False
+    all_zero_actionable_anomaly: bool = False
 
     def format(self) -> str:
         """格式化為 Telegram HTML"""
@@ -3175,6 +3180,29 @@ class WeeklyReportMessage:
         alert_health = "✅" if self.resolved_rate >= 80 else "⚠️"
         ai_health = "✅" if self.ai_success_rate >= 70 else "⚠️"
         k3s_health = "✅" if self.k3s_uptime_pct >= 99 else "⚠️"
+        source_ok_count = sum([
+            self.stats_source_ok,
+            self.k3s_source_ok,
+            self.git_source_ok,
+            self.cost_source_ok,
+        ])
+        all_zero = (
+            self.alert_total == 0
+            and self.ai_proposal_count == 0
+            and self.ai_executed_count == 0
+            and self.commits_count == 0
+            and self.deploy_count == 0
+            and self.ai_tokens_week == 0
+            and self.disposition_total == 0
+        )
+        actionable_all_zero = self.all_zero_actionable_anomaly or all_zero
+        report_trust = "低可信" if actionable_all_zero or source_ok_count < 4 else "可參考"
+        source_status = (
+            f"Stats={'ok' if self.stats_source_ok else 'fail'} / "
+            f"K3s={'ok' if self.k3s_source_ok else 'fail'} / "
+            f"Git={'ok' if self.git_source_ok else 'fail'} / "
+            f"Cost={'ok' if self.cost_source_ok else 'missing'}"
+        )
 
         message = (
             f"═══════════════════════════\n"
@@ -3182,6 +3210,11 @@ class WeeklyReportMessage:
             f"═══════════════════════════\n"
             f"📅 {html.escape(self.week_range)} | {html.escape(self.report_date)}\n"
             f"━━━━━━━━━━━━━━━━━━━\n"
+            f"🧭 <b>報表資料信任度</b>\n"
+            f"├ 判定: <b>{report_trust}</b>\n"
+            f"├ 來源: <code>{html.escape(source_status)}</code>\n"
+            f"└ 全 0: <code>{'actionable_anomaly' if actionable_all_zero else 'no'}</code>\n"
+            f"━━━━━━━━━━━━━━━━━━━\n"
             f"{alert_health} <b>告警統計</b>\n"
             f"├ 總數: <code>{self.alert_total}</code>\n"
             f"├ Critical: <code>{self.alert_critical}</code>\n"
@@ -3222,7 +3255,7 @@ class WeeklyReportMessage:
                 f"└ 自動化率: <b>{auto_rate}%</b>"
             )
 
-        return message[:1200]
+        return message[:1800]
 
 
 @dataclass