update ai insight migration for all page

backend/.env.example

@@ -64,3 +64,9 @@ CHICKEN_COUNTING_EDGE_TIMEOUT_SECONDS=30
 CHICKEN_COUNTING_EDGE_COUNTING_SYNC_ENABLED=true
 CHICKEN_COUNTING_EDGE_MORTALITY_SYNC_ENABLED=true
 CHICKEN_COUNTING_EDGE_WEIGHT_SYNC_ENABLED=true
+
+# AI Insight (Ollama on host + RAG service)
+RAG_SERVICE_URL=http://127.0.0.1:5002
+OLLAMA_BASE_URL=http://127.0.0.1:11434
+LLM_MODEL_NAME=qwen2.5:3b
+LLM_TIMEOUT_SECONDS=1200