test(ai-router): 更新 DIAGNOSE routing 測試 — None → OPENCLAW_NEMO

test_diagnose_override_is_none → test_diagnose_override_is_openclaw_nemo
配合 ai_router.py DIAGNOSE 路由修復（Ollama 238s timeout 根因修復）

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

apps/api/tests/test_p0_diagnose_routing.py

@@ -142,18 +142,19 @@ class TestLocalFallbackChain:
 class TestDiagnoseIntentOverride:
     """DIAGNOSE intent 路由設定驗證"""
 
-    def test_diagnose_override_is_none(self):
-        """_intent_provider_overrides[DIAGNOSE] 應為 None（複雜度路由）
+    def test_diagnose_override_is_openclaw_nemo(self):
+        """_intent_provider_overrides[DIAGNOSE] 應為 OPENCLAW_NEMO
 
         2026-04-12 ogt: NEMOTRON routing 暫停 — NIM tool_call 無 confidence 欄位
-        導致 confidence=0.0，待 NemotronProvider._parse_confidence() 修復後恢復。
-        目前 DIAGNOSE 走複雜度路由（Gemini/openclaw_nemo 處理）。
+        2026-04-16 ogt: 恢復 DIAGNOSE → OPENCLAW_NEMO — None 複雜度路由落入 Rule 6
+            → Ollama deepseek-r1:14b CPU 需 238s → timeout → degraded → 全部「待分析」
+            OPENCLAW_NEMO = 188:8088 NVIDIA NIM，實測 2-27s，JSON 輸出可靠
         """
-        from src.services.ai_router import AIRouter
+        from src.services.ai_router import AIRouter, AIProviderEnum
         from src.services.intent_classifier import IntentType
 
         router = AIRouter()
         override = router._intent_provider_overrides.get(IntentType.DIAGNOSE)
-        assert override is None, (
-            f"DIAGNOSE 應為 None（複雜度路由），實際為 {override}"
+        assert override is AIProviderEnum.OPENCLAW_NEMO, (
+            f"DIAGNOSE 應為 OPENCLAW_NEMO，實際為 {override}"
         )