Add activity-core LLM endpoint support

fixtures/activity_core/daily-triage-valid-content.json

@@ -0,0 +1,20 @@
+{
+  "summary": "Dummy smoke report: the always-on llm-connect endpoint can produce schema-valid daily triage JSON.",
+  "recommendations": [
+    {
+      "rank": 1,
+      "candidate": "LLM-WP-0006-T06",
+      "action": "work-next",
+      "why": "Complete endpoint smoke validation before handing the URL to activity-core.",
+      "confidence": "high",
+      "wsjf": {
+        "score": 8.5,
+        "strategic_value": 5,
+        "time_criticality": 4,
+        "risk_reduction": 4,
+        "opportunity_enablement": 4,
+        "job_size": 2
+      }
+    }
+  ]
+}