feat(telegram): SRE 戰情室群組三頭政治 Triumvirate (ADR-053)

- config.py: 新增 OPENCLAW_BOT_TOKEN / NEMOTRON_BOT_TOKEN / SRE_GROUP_CHAT_ID
- telegram_gateway.py: send_to_group / send_as_openclaw / send_as_nemotron / trigger_group_ai_discussion / _send_approval_card_to_group
- send_approval_card 告警發送後非同步觸發群組 AI 雙向討論
- configmap: SRE_GROUP_CHAT_ID=-1003711974679
- secrets: OPENCLAW_BOT_TOKEN / NEMOTRON_BOT_TOKEN CHANGE_ME 佔位

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

apps/api/src/core/config.py

@@ -345,6 +345,19 @@ class Settings(BaseSettings):
         default=False,
         description="Telegram Polling (False: OpenClaw handles it; True: only if OpenClaw unavailable)",
     )
+    # 2026-04-03 ogt: SRE 戰情室群組三頭政治 (Triumvirate) — ADR-053
+    OPENCLAW_BOT_TOKEN: str = Field(
+        default="",
+        description="@OpenClawAwoooI_Bot Token — 群組內代表 OpenClaw AI 發言",
+    )
+    NEMOTRON_BOT_TOKEN: str = Field(
+        default="",
+        description="@NemoTronAwoooI_Bot Token — 群組內代表 NemoClaw AI 發言",
+    )
+    SRE_GROUP_CHAT_ID: str = Field(
+        default="",
+        description="AwoooI SRE 戰情室群組 Chat ID",
+    )
 
     def get_tg_user_whitelist(self) -> list[int]:
         """Parse comma-separated or JSON array user IDs to list[int]"""