feat(ai): Phase 22 OpenClaw + Nemotron 協作架構 (ADR-044)

統帥批准實作「仲裁-執行分工」架構:
- OpenClaw = 仲裁者 (Why + Risk Level)
- Nemotron = 執行者 (How + kubectl Command)

新增功能:
- config.py: ENABLE_NEMOTRON_COLLABORATION Feature Flag
- openclaw.py: generate_incident_proposal_with_tools()
- openclaw.py: _call_nemotron_tools() Nemotron 呼叫
- telegram_gateway.py: TelegramMessage Nemotron 欄位
- telegram_gateway.py: format_with_nemotron() 雙區塊格式
- decision_manager.py: 整合協作方法
- proposal_service.py: 整合協作方法

觸發條件:
- LOW 風險 → 僅 OpenClaw
- MEDIUM/HIGH/CRITICAL → OpenClaw + Nemotron 雙軌

首席架構師審查: 83/100 條件通過

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/core/config.py

@@ -66,6 +66,30 @@ class Settings(BaseSettings):
         description="Phase 16: True=lewooogo packages, False=內嵌版本",
     )
 
+    # ==========================================================================
+    # Phase 22: OpenClaw + Nemotron 協作 (ADR-044)
+    # 2026-03-31 Claude Code: 統帥批准實作
+    #
+    # 功能:
+    # - ENABLE_NEMOTRON_COLLABORATION: 啟用 OpenClaw + Nemotron 雙軌協作
+    # - NEMOTRON_TIMEOUT_SECONDS: Nemotron API 呼叫超時
+    # - NEMOTRON_ASYNC_UPDATE: 異步更新模式 (先推 OpenClaw，後更新 Nemotron)
+    #
+    # 回滾指令: kubectl set env deployment/awoooi-api ENABLE_NEMOTRON_COLLABORATION=false
+    # ==========================================================================
+    ENABLE_NEMOTRON_COLLABORATION: bool = Field(
+        default=True,
+        description="Phase 22: True=啟用 OpenClaw+Nemotron 協作, False=僅 OpenClaw",
+    )
+    NEMOTRON_TIMEOUT_SECONDS: int = Field(
+        default=45,
+        description="Phase 22: Nemotron API 呼叫超時 (秒)",
+    )
+    NEMOTRON_ASYNC_UPDATE: bool = Field(
+        default=True,
+        description="Phase 22: True=異步更新 (先推 OpenClaw), False=同步等待",
+    )
+
     # ==========================================================================
     # CORS - 嚴格白名單 (無 UAT, 無 wildcard)
     # ==========================================================================